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href="#Allotropy_-_isomers"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Allotropy - isomers</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">1 comment</span> <ul id="toc-Allotropy_-_isomers-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Expert" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Expert"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Expert</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">2 comments</span> <ul id="toc-Expert-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Major_Cleanup" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Major_Cleanup"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Major Cleanup</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">1 comment</span> <ul id="toc-Major_Cleanup-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Usually_..." class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Usually_..."> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Usually ...</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">3 comments</span> <ul id="toc-Usually_...-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References_for_metals" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References_for_metals"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>References for metals</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">1 comment</span> <ul id="toc-References_for_metals-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Definition_of_Allotropy??????" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Definition_of_Allotropy??????"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Definition of Allotropy??????</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">2 comments</span> <ul id="toc-Definition_of_Allotropy??????-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Allotropy_vs_polymorphism" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Allotropy_vs_polymorphism"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Allotropy vs polymorphism</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">1 comment</span> <ul id="toc-Allotropy_vs_polymorphism-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-What_does_this_mean_?" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#What_does_this_mean_?"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>What does this mean ?</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">3 comments</span> <ul id="toc-What_does_this_mean_?-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Sigma_tin" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Sigma_tin"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>Sigma tin</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">2 comments</span> <ul id="toc-Sigma_tin-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links_modified" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links_modified"> <div class="vector-toc-text"> <span class="vector-toc-numb">11</span> <span>External links modified</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">1 comment</span> <ul id="toc-External_links_modified-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Q-Carbon" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Q-Carbon"> <div class="vector-toc-text"> <span class="vector-toc-numb">12</span> <span>Q-Carbon</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">1 comment</span> <ul id="toc-Q-Carbon-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-List_of_allotropes_section" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#List_of_allotropes_section"> <div class="vector-toc-text"> <span class="vector-toc-numb">13</span> <span>List of allotropes section</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">1 comment</span> <ul id="toc-List_of_allotropes_section-sublist" class="vector-toc-list"> </ul> </li> </ul> 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You can remove this template after fixing the problems. | <a href="/wiki/User_talk:Kanashimi" title="User talk:Kanashimi">Reporting errors</a></div></td></tr></tbody></table> <meta property="mw:PageProp/toc"/> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Comments" data-mw-thread-id="h-Comments-2006-01-17T13:42:00.000Z"><span data-mw-comment-start="" id="h-Comments-2006-01-17T13:42:00.000Z"></span>Comments<span data-mw-comment-end="h-Comments-2006-01-17T13:42:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:Allotropy&action=edit&section=1" title="Edit section: Comments"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-24.240.34.25-2011-05-04T05:51:00.000Z-Comments"></span>In the first paragraph, should graphene be considered a different allotrope of graphite? Or simply a smaller crystal of graphite constrained from vertical growth. <span style="font-size: smaller;" class="autosigned">—Preceding <a href="/wiki/Wikipedia:Signatures" title="Wikipedia:Signatures">unsigned</a> comment added by <a href="/wiki/Special:Contributions/24.240.34.25" title="Special:Contributions/24.240.34.25">24.240.34.25</a> (<a href="/w/index.php?title=User_talk:24.240.34.25&action=edit&redlink=1" class="new" title="User talk:24.240.34.25 (page does not exist)">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-24.240.34.25-2011-05-04T05:51:00.000Z-Comments" class="ext-discussiontools-init-timestamplink">05:51, 4 May 2011 (UTC)</a></span><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-24.240.34.25-2011-05-04T05:51:00.000Z-Comments"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-24.240.34.25-2011-05-04T05:51:00.000Z-Comments"></span> </p><p><span data-mw-comment-start="" id="c-207.67.132.210-2006-01-17T13:42:00.000Z-Comments"></span>Clearly, steam, water, and ice are not allotropes. However, what about the various solid phases of water (ice(I), ice(II), etc...)? I believe they would be considered <a href="/wiki/Polymorphism" class="mw-disambig" title="Polymorphism">polymorphs</a>, but probably not allotropes because water isn't a pure element. Is this correct? --<a href="/wiki/User:Matt_Stoker" class="mw-redirect" title="User:Matt Stoker">Matt Stoker</a> </p><p>Right. Allotropy refers specifically to elements. I double-checked my understanding of this with the Penguin Dictionary of Chemistry (DWA Sharp, Penguin:1990 <style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-145-051232" title="Special:BookSources/0-145-051232">0-145-051232</a><span class="error" style="font-size:100%"> Parameter error in {{<a href="/wiki/Template:ISBN" title="Template:ISBN">ISBN</a>}}: checksum</span>-2), but I'd encourage anyone to consult whatever credible reference they feel necessary. --JoeAnderson </p><p><br/> The last edit of this page commented "allotropy and isomerism are *distinct*" -- yes, but <i>how</i>? Roughly, is it the case that two allotropes will have completely different chemical properties (diamond vs carbon), while isomers tend to have similar properties (similar boiling points, etc)? -- <a href="/wiki/User:Tarquin" title="User:Tarquin">Tarquin</a>, Sunday, July 7, 2002 </p><p>It is suggested that we consult the MACMILLAN ENCYCLOPEDIA of CHEMISTRY edited by J.J.Lagowski, 1997, SIMON SCHUSTER for a definitive exposition of the subjects ALLOTROPES and POLYMORPHS. It is pointed out that there is no phenomenon that results in the existence of ALLOTROPES. Allotropes exist as a result of the differing chemical bonding of the same atoms. --Anon </p><p>Why is "allotropy" a misnomer? -<a href="/wiki/User:PierreAbbat" title="User:PierreAbbat">phma</a> </p><p>The first paragraph of this article needs to be clarified. <a href="/w/index.php?title=User:207.67.132.210&action=edit&redlink=1" class="new" title="User:207.67.132.210 (page does not exist)">207.67.132.210</a> <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-207.67.132.210-2006-01-17T13:42:00.000Z-Comments" class="ext-discussiontools-init-timestamplink">13:42, 17 January 2006 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-207.67.132.210-2006-01-17T13:42:00.000Z-Comments"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-207.67.132.210-2006-01-17T13:42:00.000Z-Comments"></span> </p><p><span data-mw-comment-start="" id="c-Xanthine-2006-05-01T00:10:00.000Z-Comments"></span>This article indicates that allotrops can exist in the the solid, liquid, or gas phases. Is this true? I have been led to believe that allotropy specifically relates the structure of the solid matrix. for example for Fe: alpha-ferrite (BCC) gamma-austenite (FCC) delta-ferrite (BCC) are all allotropes > However, I have not been able to find information confirming nor contradicting this. The text I am using as a reference is Structures and Properties of Engineering Alloys Second Edition by Smith <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-07-059172-5" title="Special:BookSources/0-07-059172-5">0-07-059172-5</a> </p> <dl><dd>Yes, those phases would be allotropes, but only when talking about pure iron. In metallurgy, it's generally preferred to use the term "phase" as opposed to "allotrope" to avoid ambiguity. Allotropes are distinct chemical species with varying reactivities and physical properties. Allotropes can be present in any phase, but some become unstable in certain phases and will transition into a more energetically favourable structure. Hope this helps. --<a href="/wiki/User:Xanthine" title="User:Xanthine">Xanthine</a> <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Xanthine-2006-05-01T00:10:00.000Z-Comments" class="ext-discussiontools-init-timestamplink">00:10, 1 May 2006 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Xanthine-2006-05-01T00:10:00.000Z-Comments"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Xanthine-2006-05-01T00:10:00.000Z-Comments"></span></dd></dl> <p><span data-mw-comment-start="" id="c-Dirac66-2013-04-16T22:11:00.000Z-Comments"></span>I have a doubt whether the amorphous state of some element (let's say C) can be called an allotrope of that element; shouldn't "allotrope" be used just for different crystalline forms? comparing amorphous and crystalline ... isn't it a bit like comparing liquid and solid? for polymorphism this doubt does not exist and indeed the term refers only to different crystalline forms of the same compound. </p><p>16:38, 16 April 2013 (UTC)G <span style="font-size: smaller;" class="autosigned">— Preceding <a href="/wiki/Wikipedia:Signatures" title="Wikipedia:Signatures">unsigned</a> comment added by <a href="/wiki/Special:Contributions/193.5.152.144" title="Special:Contributions/193.5.152.144">193.5.152.144</a> (<a href="/w/index.php?title=User_talk:193.5.152.144&action=edit&redlink=1" class="new" title="User talk:193.5.152.144 (page does not exist)">talk</a>) </span> </p> <dl><dd>The question is not what makes sense to Wikipedia editors, but rather how does the scientific literature use the term. The article now implies that the term is NOT restricted to crystalline phases, and is even used for gases such as dioxygen and ozone (trioxygen). If this is incorrect, we need reliable sources which say so explicitly. <a href="/wiki/User:Dirac66" title="User:Dirac66">Dirac66</a> (<a href="/wiki/User_talk:Dirac66" title="User talk:Dirac66">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Dirac66-2013-04-16T22:11:00.000Z-Comments" class="ext-discussiontools-init-timestamplink">22:11, 16 April 2013 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Dirac66-2013-04-16T22:11:00.000Z-Comments"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Dirac66-2013-04-16T22:11:00.000Z-Comments"></span></dd></dl> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Allotropy_-_isomers" data-mw-thread-id="h-Allotropy_-_isomers-2006-01-26T02:25:00.000Z"><span data-mw-comment-start="" id="h-Allotropy_-_isomers-2006-01-26T02:25:00.000Z"></span>Allotropy - isomers<span data-mw-comment-end="h-Allotropy_-_isomers-2006-01-26T02:25:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:Allotropy&action=edit&section=2" title="Edit section: Allotropy - isomers"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Ανδρέας-2006-01-26T02:25:00.000Z-Allotropy_-_isomers"></span>The term allotropy is usually only used for elements. In the case of compouds, the analogous term would be <a href="/wiki/Isomer" title="Isomer">isomers</a>. <a href="/wiki/User:%CE%91%CE%BD%CE%B4%CF%81%CE%AD%CE%B1%CF%82" class="mw-redirect" title="User:Ανδρέας">Andreas</a> <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Ανδρέας-2006-01-26T02:25:00.000Z-Allotropy_-_isomers" class="ext-discussiontools-init-timestamplink">02:25, 26 January 2006 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Ανδρέας-2006-01-26T02:25:00.000Z-Allotropy_-_isomers"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Ανδρέας-2006-01-26T02:25:00.000Z-Allotropy_-_isomers"></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Expert" data-mw-thread-id="h-Expert-2006-03-25T01:57:00.000Z"><span data-mw-comment-start="" id="h-Expert-2006-03-25T01:57:00.000Z"></span>Expert<span data-mw-comment-end="h-Expert-2006-03-25T01:57:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:Allotropy&action=edit&section=3" title="Edit section: Expert"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Kotepho-2006-03-25T01:57:00.000Z-Expert"></span>What exactly needs expert attention? <a href="/w/index.php?title=User:Kotepho&action=edit&redlink=1" class="new" title="User:Kotepho (page does not exist)">kotepho</a> <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Kotepho-2006-03-25T01:57:00.000Z-Expert" class="ext-discussiontools-init-timestamplink">01:57, 25 March 2006 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Kotepho-2006-03-25T01:57:00.000Z-Expert"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Kotepho-2006-03-25T01:57:00.000Z-Expert"></span> </p> <dl><dd><span data-mw-comment-start="" id="c-Xanthine-2006-04-30T23:11:00.000Z-Kotepho-2006-03-25T01:57:00.000Z"></span>Erm... For a start, until recently the definition said a lot more about what allotropy isn't than what it actually is... --<a href="/wiki/User:Xanthine" title="User:Xanthine">Xanthine</a> <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Xanthine-2006-04-30T23:11:00.000Z-Kotepho-2006-03-25T01:57:00.000Z" class="ext-discussiontools-init-timestamplink">23:11, 30 April 2006 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Xanthine-2006-04-30T23:11:00.000Z-Kotepho-2006-03-25T01:57:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Xanthine-2006-04-30T23:11:00.000Z-Kotepho-2006-03-25T01:57:00.000Z"></span></dd></dl> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Major_Cleanup" data-mw-thread-id="h-Major_Cleanup-2006-05-01T00:10:00.000Z"><span data-mw-comment-start="" id="h-Major_Cleanup-2006-05-01T00:10:00.000Z"></span>Major Cleanup<span data-mw-comment-end="h-Major_Cleanup-2006-05-01T00:10:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:Allotropy&action=edit&section=4" title="Edit section: Major Cleanup"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Xanthine-2006-05-01T00:10:00.000Z-Major_Cleanup"></span>I believe I'm suitably qualified to be an expert on this subject. I have done a large scale cleanup of this article, tidying up any discrepancies and clarifying a number of points. I think it reads a lot better now. If you notice any errors (factual or grammatical), please do let me know. And feel free to correct them. --<a href="/wiki/User:Xanthine" title="User:Xanthine">Xanthine</a> <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Xanthine-2006-05-01T00:10:00.000Z-Major_Cleanup" class="ext-discussiontools-init-timestamplink">00:10, 1 May 2006 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Xanthine-2006-05-01T00:10:00.000Z-Major_Cleanup"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Xanthine-2006-05-01T00:10:00.000Z-Major_Cleanup"></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Usually_..." data-mw-thread-id="h-Usually_...-2007-12-20T13:09:00.000Z"><span data-mw-comment-start="" id="h-Usually_...-2007-12-20T13:09:00.000Z"></span>Usually ...<span data-mw-comment-end="h-Usually_...-2007-12-20T13:09:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:Allotropy&action=edit&section=5" title="Edit section: Usually ..."><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Smokefoot-2007-12-20T13:09:00.000Z-Usually_..."></span>The article illustrates allotropy with two crystalline forms of Fe, but my impression is that usually allotropy refers to molecules or low dimensional materials. It can be assumed that all elements exhibit polymorphy, especially at high pressures. So while formally allotropy (isomerism for elements) is widespread, for instructional purposes, the discussion is usually limited to species existing as molecules (S, Se, As, P, C, O).--<a href="/wiki/User:Smokefoot" title="User:Smokefoot">Smokefoot</a> (<a href="/wiki/User_talk:Smokefoot" title="User talk:Smokefoot">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Smokefoot-2007-12-20T13:09:00.000Z-Usually_..." class="ext-discussiontools-init-timestamplink">13:09, 20 December 2007 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Smokefoot-2007-12-20T13:09:00.000Z-Usually_..."><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Smokefoot-2007-12-20T13:09:00.000Z-Usually_..."></span> </p> <dl><dd><span data-mw-comment-start="" id="c-Itub-2007-12-20T16:37:00.000Z-Smokefoot-2007-12-20T13:09:00.000Z"></span>Molecules or covalent solids (diamond is not a molecular solid, unless you call the entire crystal a very big molecule!) But I've never seen the term applied to metals. --<a href="/wiki/User:Itub" title="User:Itub">Itub</a> (<a href="/wiki/User_talk:Itub" title="User talk:Itub">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Itub-2007-12-20T16:37:00.000Z-Smokefoot-2007-12-20T13:09:00.000Z" class="ext-discussiontools-init-timestamplink">16:37, 20 December 2007 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Itub-2007-12-20T16:37:00.000Z-Smokefoot-2007-12-20T13:09:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Itub-2007-12-20T16:37:00.000Z-Smokefoot-2007-12-20T13:09:00.000Z"></span></dd></dl> <dl><dd><dl><dd><span data-mw-comment-start="" id="c-Itub-2008-01-09T09:58:00.000Z-Itub-2007-12-20T16:37:00.000Z"></span>I just found that many books do speak of allotropes of iron.<a rel="nofollow" class="external autonumber" href="http://books.google.com/books?q=iron%20allotrope&btnG=Search+Books&hl=en">[1]</a> These are often books on metallurgy and related topics. It is true, however, that most general chemistry textbooks only seem to give examples of allotropy among nonmetals. --<a href="/wiki/User:Itub" title="User:Itub">Itub</a> (<a href="/wiki/User_talk:Itub" title="User talk:Itub">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Itub-2008-01-09T09:58:00.000Z-Itub-2007-12-20T16:37:00.000Z" class="ext-discussiontools-init-timestamplink">09:58, 9 January 2008 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Itub-2008-01-09T09:58:00.000Z-Itub-2007-12-20T16:37:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Itub-2008-01-09T09:58:00.000Z-Itub-2007-12-20T16:37:00.000Z"></span></dd></dl></dd></dl> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="References_for_metals" data-mw-thread-id="h-References_for_metals-2008-08-19T15:19:00.000Z"><span data-mw-comment-start="" id="h-References_for_metals-2008-08-19T15:19:00.000Z"></span>References for metals<span data-mw-comment-end="h-References_for_metals-2008-08-19T15:19:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:Allotropy&action=edit&section=6" title="Edit section: References for metals"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-129.93.61.170-2008-08-19T15:19:00.000Z-References_for_metals"></span>Are there any references for the metal allotropes? Even in the crystallography open database and the inorganic crystal structure database there is no structure for strontium other than the cubic. <a href="/wiki/Special:Contributions/129.93.61.170" title="Special:Contributions/129.93.61.170">129.93.61.170</a> (<a href="/w/index.php?title=User_talk:129.93.61.170&action=edit&redlink=1" class="new" title="User talk:129.93.61.170 (page does not exist)">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-129.93.61.170-2008-08-19T15:19:00.000Z-References_for_metals" class="ext-discussiontools-init-timestamplink">15:19, 19 August 2008 (UTC)</a>Jared Hansen<span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-129.93.61.170-2008-08-19T15:19:00.000Z-References_for_metals"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-129.93.61.170-2008-08-19T15:19:00.000Z-References_for_metals"></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Definition_of_Allotropy??????" data-mw-thread-id="h-Definition_of_Allotropy??????-2010-07-10T03:24:00.000Z"><span id="Definition_of_Allotropy.3F.3F.3F.3F.3F.3F"></span><span data-mw-comment-start="" id="h-Definition_of_Allotropy??????-2010-07-10T03:24:00.000Z"></span>Definition of Allotropy??????<span data-mw-comment-end="h-Definition_of_Allotropy??????-2010-07-10T03:24:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:Allotropy&action=edit&section=7" title="Edit section: Definition of Allotropy??????"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Shivaaprs-2010-07-10T03:24:00.000Z-Definition_of_Allotropy??????"></span>It is saying that in the definition the word "chemical elements", but silica (SiO2) is not a element. But it has allotropic forms??????????? <small><span class="autosigned">—Preceding <a href="/wiki/Wikipedia:Signatures" title="Wikipedia:Signatures">unsigned</a> comment added by <a href="/wiki/User:Shivaaprs" title="User:Shivaaprs">Shivaaprs</a> (<a href="/wiki/User_talk:Shivaaprs" title="User talk:Shivaaprs">talk</a> • <a href="/wiki/Special:Contributions/Shivaaprs" title="Special:Contributions/Shivaaprs">contribs</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Shivaaprs-2010-07-10T03:24:00.000Z-Definition_of_Allotropy??????" class="ext-discussiontools-init-timestamplink">03:24, 10 July 2010 (UTC)</a></span></small><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Shivaaprs-2010-07-10T03:24:00.000Z-Definition_of_Allotropy??????"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Shivaaprs-2010-07-10T03:24:00.000Z-Definition_of_Allotropy??????"></span> </p> <dl><dd><span data-mw-comment-start="" id="c-Dirac66-2010-07-10T12:27:00.000Z-Shivaaprs-2010-07-10T03:24:00.000Z"></span>The article refers to the element silicon (Si), not the compound silica which is the short name for silicon dioxide (SiO<sub>2</sub>). <a href="/wiki/User:Dirac66" title="User:Dirac66">Dirac66</a> (<a href="/wiki/User_talk:Dirac66" title="User talk:Dirac66">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Dirac66-2010-07-10T12:27:00.000Z-Shivaaprs-2010-07-10T03:24:00.000Z" class="ext-discussiontools-init-timestamplink">12:27, 10 July 2010 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Dirac66-2010-07-10T12:27:00.000Z-Shivaaprs-2010-07-10T03:24:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Dirac66-2010-07-10T12:27:00.000Z-Shivaaprs-2010-07-10T03:24:00.000Z"></span></dd></dl> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Allotropy_vs_polymorphism" data-mw-thread-id="h-Allotropy_vs_polymorphism-2012-02-01T00:31:00.000Z"><span data-mw-comment-start="" id="h-Allotropy_vs_polymorphism-2012-02-01T00:31:00.000Z"></span>Allotropy vs polymorphism<span data-mw-comment-end="h-Allotropy_vs_polymorphism-2012-02-01T00:31:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:Allotropy&action=edit&section=8" title="Edit section: Allotropy vs polymorphism"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Dirac66-2012-02-01T00:31:00.000Z-Allotropy_vs_polymorphism"></span>User 201.235.24.69 today added a [who?] to ask who are the many other chemists who have repeated Ostwald's advice to replace the term "allotropy" by "polymorphism". The sentence which is questioned was added by me on 18 May 2007. It is a paraphrase of Jensen's 2006 article, which refers to "sage advice, which many have since repeated", with a reference to a 1964 book "The allotropy of the elements" by W.E. Addison. I will add a reference to indicate the source of this sentence and the word "many", even if Wikipedia does not identify the many. <a href="/wiki/User:Dirac66" title="User:Dirac66">Dirac66</a> (<a href="/wiki/User_talk:Dirac66" title="User talk:Dirac66">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Dirac66-2012-02-01T00:31:00.000Z-Allotropy_vs_polymorphism" class="ext-discussiontools-init-timestamplink">00:31, 1 February 2012 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Dirac66-2012-02-01T00:31:00.000Z-Allotropy_vs_polymorphism"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Dirac66-2012-02-01T00:31:00.000Z-Allotropy_vs_polymorphism"></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="What_does_this_mean_?" data-mw-thread-id="h-What_does_this_mean_?-2013-09-16T06:27:00.000Z"><span id="What_does_this_mean_.3F"></span><span data-mw-comment-start="" id="h-What_does_this_mean_?-2013-09-16T06:27:00.000Z"></span>What does this mean ?<span data-mw-comment-end="h-What_does_this_mean_?-2013-09-16T06:27:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:Allotropy&action=edit&section=9" title="Edit section: What does this mean ?"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-77.96.59.93-2013-09-16T06:27:00.000Z-What_does_this_mean_?"></span>"Allotropes are typically more noticeable in non-metals ..." Does it mean that we are more likely to notice the difference in the cases of non-metallic allotropes, or that non-metals are more likely to exhibit allotropy ? <a href="/wiki/Special:Contributions/77.96.59.93" title="Special:Contributions/77.96.59.93">77.96.59.93</a> (<a href="/wiki/User_talk:77.96.59.93" title="User talk:77.96.59.93">talk</a>) <span style="font-size: smaller;" class="autosigned">—Preceding <a href="/wiki/Wikipedia:Signatures" title="Wikipedia:Signatures">undated</a> comment added <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-77.96.59.93-2013-09-16T06:27:00.000Z-What_does_this_mean_?" class="ext-discussiontools-init-timestamplink">06:27, 16 September 2013 (UTC)</a></span><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-77.96.59.93-2013-09-16T06:27:00.000Z-What_does_this_mean_?"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-77.96.59.93-2013-09-16T06:27:00.000Z-What_does_this_mean_?"></span> </p> <dl><dd><span data-mw-comment-start="" id="c-Dirac66-2013-09-16T10:58:00.000Z-77.96.59.93-2013-09-16T06:27:00.000Z"></span>A revision history search shows that this phrase was added on 30 April 2006 by Xanthine who has been inactive on Wikipedia since 2009. So we are unlikely to have a reply from the author of this phrase. I think that this and the following sentence about metals should just be deleted, unless someone can provide a clearer statement about the occurrence of allotropy in non-metals and in metals, preferably with a source. <a href="/wiki/User:Dirac66" title="User:Dirac66">Dirac66</a> (<a href="/wiki/User_talk:Dirac66" title="User talk:Dirac66">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Dirac66-2013-09-16T10:58:00.000Z-77.96.59.93-2013-09-16T06:27:00.000Z" class="ext-discussiontools-init-timestamplink">10:58, 16 September 2013 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Dirac66-2013-09-16T10:58:00.000Z-77.96.59.93-2013-09-16T06:27:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Dirac66-2013-09-16T10:58:00.000Z-77.96.59.93-2013-09-16T06:27:00.000Z"></span> <dl><dd><span data-mw-comment-start="" id="c-Dirac66-2014-01-31T00:25:00.000Z-Dirac66-2013-09-16T10:58:00.000Z"></span>Done. <a href="/wiki/User:Dirac66" title="User:Dirac66">Dirac66</a> (<a href="/wiki/User_talk:Dirac66" title="User talk:Dirac66">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Dirac66-2014-01-31T00:25:00.000Z-Dirac66-2013-09-16T10:58:00.000Z" class="ext-discussiontools-init-timestamplink">00:25, 31 January 2014 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Dirac66-2014-01-31T00:25:00.000Z-Dirac66-2013-09-16T10:58:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Dirac66-2014-01-31T00:25:00.000Z-Dirac66-2013-09-16T10:58:00.000Z"></span></dd></dl></dd></dl> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Sigma_tin" data-mw-thread-id="h-Sigma_tin-2014-01-29T08:00:00.000Z"><span data-mw-comment-start="" id="h-Sigma_tin-2014-01-29T08:00:00.000Z"></span>Sigma tin<span data-mw-comment-end="h-Sigma_tin-2014-01-29T08:00:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:Allotropy&action=edit&section=10" title="Edit section: Sigma tin"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-202.172.102.81-2014-01-29T08:00:00.000Z-Sigma_tin"></span>What is sigma tin? I don't seem to be able to find anything about it. Except from Sigma Tin Alloy Manufacturers (Pte) Ltd which is located in Singapore. Grey tin AKA tin pest is stable below 13C to -274. White tin (normal tin) is stable between 13C and 161C and Rhombic tin is stable between 161C and melting point. This doesn't leave much space for sigma tin. <span style="font-size: smaller;" class="autosigned">— Preceding <a href="/wiki/Wikipedia:Signatures" title="Wikipedia:Signatures">unsigned</a> comment added by <a href="/wiki/Special:Contributions/202.172.102.81" title="Special:Contributions/202.172.102.81">202.172.102.81</a> (<a href="/w/index.php?title=User_talk:202.172.102.81&action=edit&redlink=1" class="new" title="User talk:202.172.102.81 (page does not exist)">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-202.172.102.81-2014-01-29T08:00:00.000Z-Sigma_tin" class="ext-discussiontools-init-timestamplink">08:00, 29 January 2014 (UTC)</a></span><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-202.172.102.81-2014-01-29T08:00:00.000Z-Sigma_tin"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-202.172.102.81-2014-01-29T08:00:00.000Z-Sigma_tin"></span> </p> <dl><dd><span data-mw-comment-start="" id="c-Dirac66-2014-01-31T00:25:00.000Z-202.172.102.81-2014-01-29T08:00:00.000Z"></span>First, I have moved this comment down to a new section at the end of the talk page. The data you cite for grey, white and rhombic tin is for pressure = 1 atm. However the article on <a href="/wiki/Tin" title="Tin">Tin</a> mentions a σ phase at very high pressures. I checked the (translated Russian) source and the σ phase is stable at over 40 GPa (= 4 x 10<sup>5</sup> atm). I will add a note to this article with the source.</dd> <dd>And I doubt that the company in Singapore works at such high pressure. Probably the use of Sigma is a coincidence and they just chose the name arbitrarily, or perhaps because Sigma sounds like Singapore <a href="/wiki/User:Dirac66" title="User:Dirac66">Dirac66</a> (<a href="/wiki/User_talk:Dirac66" title="User talk:Dirac66">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Dirac66-2014-01-31T00:25:00.000Z-202.172.102.81-2014-01-29T08:00:00.000Z" class="ext-discussiontools-init-timestamplink">00:25, 31 January 2014 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Dirac66-2014-01-31T00:25:00.000Z-202.172.102.81-2014-01-29T08:00:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Dirac66-2014-01-31T00:25:00.000Z-202.172.102.81-2014-01-29T08:00:00.000Z"></span></dd></dl> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="External_links_modified" data-mw-thread-id="h-External_links_modified-2016-03-10T08:11:00.000Z"><span data-mw-comment-start="" id="h-External_links_modified-2016-03-10T08:11:00.000Z"></span>External links modified<span data-mw-comment-end="h-External_links_modified-2016-03-10T08:11:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:Allotropy&action=edit&section=11" title="Edit section: External links modified"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Cyberbot_II-2016-03-10T08:11:00.000Z-External_links_modified"></span>Hello fellow Wikipedians, </p><p>I have just added archive links to one external link on <a href="/wiki/Allotropy" title="Allotropy">Allotropy</a>. Please take a moment to review <a class="external text" href="https://en.wikipedia.org/w/index.php?diff=prev&oldid=709321798">my edit</a>. If necessary, add <code>{{<a href="/wiki/Template:Cbignore" title="Template:Cbignore">cbignore</a>}}</code> after the link to keep me from modifying it. Alternatively, you can add <code>{{<a href="/wiki/Template:Nobots" class="mw-redirect" title="Template:Nobots">nobots</a>|deny=InternetArchiveBot}}</code> to keep me off the page altogether. I made the following changes: </p> <ul><li>Added archive <a rel="nofollow" class="external free" href="http://web.archive.org/web/20080131061355/http://www.physics.uoguelph.ca:80/summer/scor/articles/scor40.htm">http://web.archive.org/web/20080131061355/http://www.physics.uoguelph.ca:80/summer/scor/articles/scor40.htm</a> to <a rel="nofollow" class="external free" href="http://www.physics.uoguelph.ca/summer/scor/articles/scor40.htm">http://www.physics.uoguelph.ca/summer/scor/articles/scor40.htm</a></li></ul> <p>When you have finished reviewing my changes, please set the <i>checked</i> parameter below to <b>true</b> or <b>failed</b> to let others know (documentation at <code>{{<a href="/wiki/Template:Sourcecheck" class="mw-redirect" title="Template:Sourcecheck">Sourcecheck</a>}}</code>). </p><p><span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/20px-Yes_check.svg.png" decoding="async" width="20" height="20" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/30px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/40px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600"/></span></span><span style="display:none">Y</span> <i>An editor has reviewed this edit and fixed any errors that were found.</i> </p> <ul><li>If you have discovered URLs which were erroneously considered dead by the bot, you can report them with <a rel="nofollow" class="external text" href="https://iabot.wmcloud.org/index.php?page=reportfalsepositive">this tool</a>.</li> <li>If you found an error with any archives or the URLs themselves, you can fix them with <a rel="nofollow" class="external text" href="https://iabot.wmcloud.org/index.php?page=manageurlsingle">this tool</a>.</li></ul> <p>Cheers.—<a href="/wiki/User:Cyberbot_II" title="User:Cyberbot II"><sup style="color:green;font-family:Courier">cyberbot II</sup></a><small><sub style="margin-left:-14.9ex;color:green;font-family:Comic Sans MS"><a href="/wiki/User_talk:Cyberbot_II" class="mw-redirect" title="User talk:Cyberbot II"><span style="color:green">Talk to my owner</span></a>:Online</sub></small> <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Cyberbot_II-2016-03-10T08:11:00.000Z-External_links_modified" class="ext-discussiontools-init-timestamplink">08:11, 10 March 2016 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Cyberbot_II-2016-03-10T08:11:00.000Z-External_links_modified"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Cyberbot_II-2016-03-10T08:11:00.000Z-External_links_modified"></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Q-Carbon" data-mw-thread-id="h-Q-Carbon-2019-02-05T12:49:00.000Z"><span data-mw-comment-start="" id="h-Q-Carbon-2019-02-05T12:49:00.000Z"></span>Q-Carbon<span data-mw-comment-end="h-Q-Carbon-2019-02-05T12:49:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:Allotropy&action=edit&section=12" title="Edit section: Q-Carbon"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Anon,_a_mouse...-2019-02-05T12:49:00.000Z-Q-Carbon"></span>I am placing a 'dubious' tag on the Q-Carbon entry on the list of allotropes. </p><p>If you follow the link to the Q-Carbon page there are several ongoing disputes that call these claims into question, including whether it is a genuine carbon allotrope at all. There are also serious questions of editorial impartiality there. </p><p>The entry for Q-Carbon also seems to stick out on the list of examples for a lack of neutral language. It seems to be extolling the virtues of Q-Carbon rather than summarizing its properties, e.g. "tough" and "brilliant". </p><p>If the list is not meant to be exhaustive, I would suggest that this line simply be struck. <a href="/w/index.php?title=User:Anon,_a_mouse...&action=edit&redlink=1" class="new" title="User:Anon, a mouse... (page does not exist)">Anon, a mouse...</a> (<a href="/wiki/User_talk:Anon,_a_mouse..." class="mw-redirect" title="User talk:Anon, a mouse...">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Anon,_a_mouse...-2019-02-05T12:49:00.000Z-Q-Carbon" class="ext-discussiontools-init-timestamplink">12:49, 5 February 2019 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Anon,_a_mouse...-2019-02-05T12:49:00.000Z-Q-Carbon"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Anon,_a_mouse...-2019-02-05T12:49:00.000Z-Q-Carbon"></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="List_of_allotropes_section" data-mw-thread-id="h-List_of_allotropes_section-2020-12-30T10:38:00.000Z"><span data-mw-comment-start="" id="h-List_of_allotropes_section-2020-12-30T10:38:00.000Z"></span>List of allotropes section<span data-mw-comment-end="h-List_of_allotropes_section-2020-12-30T10:38:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:Allotropy&action=edit&section=13" title="Edit section: List of allotropes section"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Torrent97-2020-12-30T10:38:00.000Z-List_of_allotropes_section"></span>I've removed the 2009 expansion request template. There seems to be no need for it anymore. <a href="/wiki/User:Torrent97" title="User:Torrent97">Torrent97</a> (<a href="/wiki/User_talk:Torrent97" title="User talk:Torrent97">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Allotropy#c-Torrent97-2020-12-30T10:38:00.000Z-List_of_allotropes_section" class="ext-discussiontools-init-timestamplink">10:38, 30 December 2020 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Torrent97-2020-12-30T10:38:00.000Z-List_of_allotropes_section"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Torrent97-2020-12-30T10:38:00.000Z-List_of_allotropes_section"></span> </p>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Talk:Allotropy&oldid=1193882605">https://en.wikipedia.org/w/index.php?title=Talk:Allotropy&oldid=1193882605</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:C-Class_level-4_vital_articles" title="Category:C-Class level-4 vital articles">C-Class level-4 vital articles</a></li><li><a href="/wiki/Category:Wikipedia_level-4_vital_articles_in_Physical_sciences" title="Category:Wikipedia level-4 vital articles in Physical sciences">Wikipedia level-4 vital articles in Physical sciences</a></li><li><a href="/wiki/Category:C-Class_vital_articles_in_Physical_sciences" title="Category:C-Class vital articles in Physical sciences">C-Class vital articles in Physical sciences</a></li><li><a href="/wiki/Category:C-Class_chemical_elements_articles" title="Category:C-Class chemical elements articles">C-Class chemical elements articles</a></li><li><a href="/wiki/Category:Low-importance_chemical_elements_articles" title="Category:Low-importance chemical elements articles">Low-importance chemical elements articles</a></li><li><a href="/wiki/Category:WikiProject_Elements_articles" title="Category:WikiProject Elements articles">WikiProject Elements articles</a></li><li><a href="/wiki/Category:C-Class_Chemistry_articles" title="Category:C-Class Chemistry articles">C-Class Chemistry articles</a></li><li><a href="/wiki/Category:Low-importance_Chemistry_articles" title="Category:Low-importance Chemistry articles">Low-importance Chemistry articles</a></li><li><a href="/wiki/Category:WikiProject_Chemistry_articles" title="Category:WikiProject Chemistry articles">WikiProject Chemistry articles</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:All_Wikipedia_vital_articles" title="Category:All Wikipedia vital articles">All Wikipedia vital articles</a></li><li><a href="/wiki/Category:Pages_with_broken_anchors" title="Category:Pages with broken anchors">Pages with broken anchors</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 6 January 2024, at 03:10<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. 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