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Pleocroismo - Wikipedia

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id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostra/Nascondi l&#039;indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Pleocroismo</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vai a una voce in un&#039;altra lingua. Disponibile in 38 lingue" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-38" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">38 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Pleochro%C3%AFsme" title="Pleochroïsme - afrikaans" lang="af" hreflang="af" data-title="Pleochroïsme" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AA%D8%BA%D9%8A%D8%B1_%D9%84%D9%88%D9%86%D9%8A" title="تغير لوني - arabo" lang="ar" hreflang="ar" data-title="تغير لوني" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9F%D0%BB%D0%B5%D0%BE%D1%85%D1%80%D0%BE%D0%B8%D0%B7%D1%8A%D0%BC" title="Плеохроизъм - bulgaro" lang="bg" hreflang="bg" data-title="Плеохроизъм" data-language-autonym="Български" data-language-local-name="bulgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Pleocroisme" title="Pleocroisme - catalano" lang="ca" hreflang="ca" data-title="Pleocroisme" data-language-autonym="Català" data-language-local-name="catalano" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-de badge-Q70894304 mw-list-item" title=""><a href="https://de.wikipedia.org/wiki/Pleochroismus" title="Pleochroismus - tedesco" lang="de" hreflang="de" data-title="Pleochroismus" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A0%CE%BB%CE%B5%CE%BF%CF%87%CF%81%CF%89%CE%B9%CF%83%CE%BC%CF%8C%CF%82" title="Πλεοχρωισμός - greco" lang="el" hreflang="el" data-title="Πλεοχρωισμός" data-language-autonym="Ελληνικά" data-language-local-name="greco" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Pleochroism" title="Pleochroism - inglese" lang="en" hreflang="en" data-title="Pleochroism" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Pleocro%C3%ADsmo" title="Pleocroísmo - spagnolo" lang="es" hreflang="es" data-title="Pleocroísmo" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Pleokroism" title="Pleokroism - estone" lang="et" hreflang="et" data-title="Pleokroism" data-language-autonym="Eesti" data-language-local-name="estone" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Pleokroismo" title="Pleokroismo - basco" lang="eu" hreflang="eu" data-title="Pleokroismo" data-language-autonym="Euskara" data-language-local-name="basco" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%DA%86%D9%86%D8%AF%D8%B1%D9%86%DA%AF%E2%80%8C%D9%86%D9%85%D8%A7%DB%8C%DB%8C" title="چندرنگ‌نمایی - persiano" lang="fa" hreflang="fa" data-title="چندرنگ‌نمایی" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Pl%C3%A9ochro%C3%AFsme" title="Pléochroïsme - francese" lang="fr" hreflang="fr" data-title="Pléochroïsme" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A4%D7%9C%D7%90%D7%95%D7%9B%D7%A8%D7%95%D7%90%D7%99%D7%96%D7%9D" title="פלאוכרואיזם - ebraico" lang="he" hreflang="he" data-title="פלאוכרואיזם" data-language-autonym="עברית" data-language-local-name="ebraico" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Pleokroizam" title="Pleokroizam - croato" lang="hr" hreflang="hr" data-title="Pleokroizam" data-language-autonym="Hrvatski" data-language-local-name="croato" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Pleokroizmus" title="Pleokroizmus - ungherese" lang="hu" hreflang="hu" data-title="Pleokroizmus" data-language-autonym="Magyar" data-language-local-name="ungherese" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%8A%D5%AC%D5%A5%D5%B8%D6%84%D6%80%D5%B8%D5%AB%D5%A6%D5%B4" title="Պլեոքրոիզմ - armeno" lang="hy" hreflang="hy" data-title="Պլեոքրոիզմ" data-language-autonym="Հայերեն" data-language-local-name="armeno" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Pleokroisme" title="Pleokroisme - indonesiano" lang="id" hreflang="id" data-title="Pleokroisme" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiano" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%A4%9A%E8%89%B2%E6%80%A7" title="多色性 - giapponese" lang="ja" hreflang="ja" data-title="多色性" data-language-autonym="日本語" data-language-local-name="giapponese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%9F%D0%BB%D0%B5%D0%BE%D1%85%D1%80%D0%BE%D0%B8%D0%B7%D0%BC" title="Плеохроизм - kazako" lang="kk" hreflang="kk" data-title="Плеохроизм" data-language-autonym="Қазақша" data-language-local-name="kazako" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%8B%A4%EC%83%89%EC%84%B1" title="다색성 - coreano" lang="ko" hreflang="ko" data-title="다색성" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%9F%D0%BB%D0%B5%D0%BE%D1%85%D1%80%D0%BE%D0%B8%D0%B7%D0%BC" title="Плеохроизм - kirghiso" lang="ky" hreflang="ky" data-title="Плеохроизм" data-language-autonym="Кыргызча" data-language-local-name="kirghiso" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Pleohroisms" title="Pleohroisms - lettone" lang="lv" hreflang="lv" data-title="Pleohroisms" data-language-autonym="Latviešu" data-language-local-name="lettone" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%9F%E0%B5%8D%E0%B4%B0%E0%B5%88%E0%B4%95%E0%B5%8D%E0%B4%95%E0%B5%8D%E0%B4%B0%E0%B5%8B%E0%B4%AF%E0%B4%BF%E0%B4%B8%E0%B4%82" title="ട്രൈക്ക്രോയിസം - malayalam" lang="ml" hreflang="ml" data-title="ട്രൈക്ക്രോയിസം" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Pleochroismus" title="Pleochroismus - basso tedesco" lang="nds" hreflang="nds" data-title="Pleochroismus" data-language-autonym="Plattdüütsch" data-language-local-name="basso tedesco" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Pleochro%C3%AFsme" title="Pleochroïsme - olandese" lang="nl" hreflang="nl" data-title="Pleochroïsme" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Pleokroisme" title="Pleokroisme - norvegese nynorsk" lang="nn" hreflang="nn" data-title="Pleokroisme" data-language-autonym="Norsk nynorsk" data-language-local-name="norvegese nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Pleochroizm" title="Pleochroizm - polacco" lang="pl" hreflang="pl" data-title="Pleochroizm" data-language-autonym="Polski" data-language-local-name="polacco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Pleocro%C3%ADsmo" title="Pleocroísmo - portoghese" lang="pt" hreflang="pt" data-title="Pleocroísmo" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Pleocroism" title="Pleocroism - rumeno" lang="ro" hreflang="ro" data-title="Pleocroism" data-language-autonym="Română" data-language-local-name="rumeno" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9F%D0%BB%D0%B5%D0%BE%D1%85%D1%80%D0%BE%D0%B8%D0%B7%D0%BC" title="Плеохроизм - russo" lang="ru" hreflang="ru" data-title="Плеохроизм" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Pleokroizam" title="Pleokroizam - serbo-croato" lang="sh" hreflang="sh" data-title="Pleokroizam" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croato" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Pleohroizem" title="Pleohroizem - sloveno" lang="sl" hreflang="sl" data-title="Pleohroizem" data-language-autonym="Slovenščina" data-language-local-name="sloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9F%D0%BB%D0%B5%D0%BE%D1%85%D1%80%D0%BE%D0%B8%D0%B7%D0%B0%D0%BC" title="Плеохроизам - serbo" lang="sr" hreflang="sr" data-title="Плеохроизам" data-language-autonym="Српски / srpski" data-language-local-name="serbo" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Pleokroism" title="Pleokroism - svedese" lang="sv" hreflang="sv" data-title="Pleokroism" data-language-autonym="Svenska" data-language-local-name="svedese" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9F%D0%BB%D0%B5%D0%BE%D1%85%D1%80%D0%BE%D1%97%D0%B7%D0%BC" title="Плеохроїзм - ucraino" lang="uk" hreflang="uk" data-title="Плеохроїзм" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Pleoxroizm" title="Pleoxroizm - uzbeco" lang="uz" hreflang="uz" data-title="Pleoxroizm" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbeco" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/%C4%90a_s%E1%BA%AFc" title="Đa sắc - vietnamita" lang="vi" hreflang="vi" data-title="Đa sắc" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%A4%9A%E8%89%B2%E6%80%A7" title="多色性 - cinese" lang="zh" hreflang="zh" data-title="多色性" data-language-autonym="中文" data-language-local-name="cinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit 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class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">nascondi</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Da Wikipedia, l&#039;enciclopedia libera.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="it" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r133964453">.mw-parser-output .avviso .mbox-text-div>div,.mw-parser-output .avviso .mbox-text-full-div>div{font-size:90%}.mw-parser-output .avviso .mbox-image{flex-basis:52px;flex-grow:0;flex-shrink:0}.mw-parser-output .avviso .mbox-text-full-div .hide-when-compact{display:block}</style><div style="" class="ambox metadata noprint plainlinks avviso avviso-generico"> <div class="avviso-immagine mbox-image noprint"><span typeof="mw:File"><a href="/wiki/File:Crystal_Clear_app_no3D.svg" class="mw-file-description" title="Abbozzo mineralogia"><img alt="Abbozzo mineralogia" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Crystal_Clear_app_no3D.svg/45px-Crystal_Clear_app_no3D.svg.png" decoding="async" width="45" height="45" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Crystal_Clear_app_no3D.svg/68px-Crystal_Clear_app_no3D.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Crystal_Clear_app_no3D.svg/90px-Crystal_Clear_app_no3D.svg.png 2x" data-file-width="129" data-file-height="129" /></a></span></div> <div class="avviso-testo mbox-text"> <div class="mbox-text-div"><b>Questa voce &#32;sull'argomento mineralogia è solo un <a href="/wiki/Aiuto:Abbozzo" title="Aiuto:Abbozzo">abbozzo</a></b>.<br /> <div style="font-size:90%;"><a class="external text" href="https://it.wikipedia.org/w/index.php?title=Pleocroismo&amp;action=edit">Contribuisci</a> a migliorarla secondo le <a href="/wiki/Aiuto:Manuale_di_stile" title="Aiuto:Manuale di stile">convenzioni di Wikipedia</a>. Segui i suggerimenti del <a href="/wiki/Progetto:Mineralogia" title="Progetto:Mineralogia">progetto di riferimento</a>.</div> <div class="hide-when-compact"> </div> </div> </div> </div> <div class="thumb tright"><div class="thumbinner" style="width:308px;flex-direction:row"><div class="tsingle" style="float:left;margin:1px;width:152px;padding-left:0px;padding-right:0px"><div class="thumbimage"><span typeof="mw:File"><a href="/wiki/File:Cordierite_-_bevellinged_with_necklace_-_view_on_blue-violet_a-axis.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Cordierite_-_bevellinged_with_necklace_-_view_on_blue-violet_a-axis.jpg/150px-Cordierite_-_bevellinged_with_necklace_-_view_on_blue-violet_a-axis.jpg" decoding="async" width="150" height="206" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Cordierite_-_bevellinged_with_necklace_-_view_on_blue-violet_a-axis.jpg/225px-Cordierite_-_bevellinged_with_necklace_-_view_on_blue-violet_a-axis.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Cordierite_-_bevellinged_with_necklace_-_view_on_blue-violet_a-axis.jpg/300px-Cordierite_-_bevellinged_with_necklace_-_view_on_blue-violet_a-axis.jpg 2x" data-file-width="800" data-file-height="1100" /></a></span></div><div class="thumbcaption" style="clear:left">La cordierite sfaccettata vista nella direzione del blu-violetto asse –a</div></div><div class="tsingle" style="float:left;margin:1px;width:152px;padding-left:0px;padding-right:0px"><div class="thumbimage"><span typeof="mw:File"><a href="/wiki/File:Cordierite_-_bevellinged_with_necklace_-_view_on_colorless_b-axis.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6d/Cordierite_-_bevellinged_with_necklace_-_view_on_colorless_b-axis.jpg/150px-Cordierite_-_bevellinged_with_necklace_-_view_on_colorless_b-axis.jpg" decoding="async" width="150" height="200" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6d/Cordierite_-_bevellinged_with_necklace_-_view_on_colorless_b-axis.jpg/225px-Cordierite_-_bevellinged_with_necklace_-_view_on_colorless_b-axis.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6d/Cordierite_-_bevellinged_with_necklace_-_view_on_colorless_b-axis.jpg/300px-Cordierite_-_bevellinged_with_necklace_-_view_on_colorless_b-axis.jpg 2x" data-file-width="900" data-file-height="1200" /></a></span></div><div class="thumbcaption" style="clear:left">La cordierite sfaccettata vista nella direzione dell'asse –b (colore debole)</div></div><div style="clear:left"></div></div></div> <p>Il <b>pleocroismo</b> è un fenomeno osservabile in alcuni <a href="/wiki/Cristallo" title="Cristallo">cristalli</a>, che si manifesta con una variazione di <a href="/wiki/Colore" title="Colore">colore</a> osservando il cristallo da direzioni diverse. Se i colori diversi osservabili sono due, si parla di <b>dicroismo</b>, se invece sono tre, si dice <b>tricroismo</b>. Il pleocroismo si può presentare di vari livelli: nullo, debole, medio o forte, a seconda di quanto è evidente la variazione del colore ruotando il campione.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup> </p><p>L'effetto è dovuto alla differente capacità del cristallo di assorbire la luce incidente policromatica, a seconda dell'orientamento assunto dal raggio di luce rispetto alle direzioni cristallografiche. Il comportamento si manifesta in presenza di un <a href="/wiki/Reticolo_di_Bravais" title="Reticolo di Bravais">reticolo cristallino</a> non equivalente per simmetria nelle tre direzioni, quindi si può presentare solo con cristalli <a href="/wiki/Birifrangenza" title="Birifrangenza">birifrangenti</a>. </p><p>Esiste uno strumento, chiamato <a href="/w/index.php?title=Dicroscopio&amp;action=edit&amp;redlink=1" class="new" title="Dicroscopio (la pagina non esiste)">dicroscopio</a>, che permette di vedere affiancati i vari colori della pietra. </p><p>Uno dei minerali che presenta il fenomeno in modo più evidente è la <a href="/wiki/Cordierite" title="Cordierite">cordierite</a> (tanto da esser chiamata anche dicroite), il cui colore può variare dal giallo al blu-viola. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Pleocroismo&amp;veaction=edit&amp;section=1" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Pleocroismo&amp;action=edit&amp;section=1" title="Edit section&#039;s source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> Bitnet, <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160308055447/http://www.minerali.it/articolo-scientifico/Proprieta-dei-minerali/Mineralogia/aefbf75e-c17d-4470-8de5-c4d33fd79dc7/Pleocroismo.aspx"><span style="font-style:italic;">Minerali - Mineralogia - Pleocroismo</span></a>, su <span style="font-style:italic;">minerali.it</span>. <small>URL consultato il 7 marzo 2016</small> <small>(archiviato dall'<abbr title="http&#58;//www.minerali.it/articolo-scientifico/Proprieta-dei-minerali/Mineralogia/aefbf75e-c17d-4470-8de5-c4d33fd79dc7/Pleocroismo.aspx">url originale</abbr> l'8 marzo 2016)</small>.</cite></span> </li> <li id="cite_note-2"><a href="#cite_ref-2"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160308054022/http://www.dst.uniroma1.it/Dominic/Pagine/pleocroismo.htm"><span style="font-style:italic;">Dominic: Pleocroismo</span></a>, su <span style="font-style:italic;">dst.uniroma1.it</span>. <small>URL consultato il 7 marzo 2016</small> <small>(archiviato dall'<abbr title="http&#58;//www.dst.uniroma1.it/Dominic/Pagine/pleocroismo.htm">url originale</abbr> l'8 marzo 2016)</small>.</cite></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Voci_correlate">Voci correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Pleocroismo&amp;veaction=edit&amp;section=2" title="Modifica la sezione Voci correlate" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Pleocroismo&amp;action=edit&amp;section=2" title="Edit section&#039;s source code: Voci correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Vetro_dicroico" title="Vetro dicroico">Vetro dicroico</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Altri_progetti">Altri progetti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Pleocroismo&amp;veaction=edit&amp;section=3" title="Modifica la sezione Altri progetti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Pleocroismo&amp;action=edit&amp;section=3" title="Edit section&#039;s source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><a href="https://it.wiktionary.org/wiki/pleocroismo" class="extiw" title="wikt:pleocroismo">Wikizionario</a></li> <li class="" title=""><span class="plainlinks" title="commons:Category:Pleochroism"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Pleochroism?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://it.wiktionary.org/wiki/" title="Collabora a Wikizionario"><img alt="Collabora a Wikizionario" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/18px-Wiktionary_small.svg.png" decoding="async" width="18" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/27px-Wiktionary_small.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/36px-Wiktionary_small.svg.png 2x" data-file-width="350" data-file-height="350" /></a></span> <a href="https://it.wiktionary.org/wiki/" class="extiw" title="wikt:">Wikizionario</a> contiene il lemma di dizionario «<b><a href="https://it.wiktionary.org/wiki/pleocroismo" class="extiw" title="wikt:pleocroismo">pleocroismo</a></b>»</li> <li><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/?uselang=it" title="Collabora a Wikimedia Commons"><img alt="Collabora a Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png" decoding="async" width="18" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/27px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/36px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/?uselang=it">Wikimedia Commons</a></span> contiene immagini o altri file su <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Pleochroism?uselang=it">pleocroismo</a></span></b></li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Pleocroismo&amp;veaction=edit&amp;section=4" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Pleocroismo&amp;action=edit&amp;section=4" title="Edit section&#039;s source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li class="mw-empty-elt"></li> <li><cite id="CITEREFBritannica.com" class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://www.britannica.com/science/pleochroism"><span style="font-style:italic;">pleochroism</span></a>, su <span style="font-style:italic;"><a href="/wiki/Enciclopedia_Britannica" title="Enciclopedia Britannica">Enciclopedia Britannica</a></span>, Encyclopædia Britannica, Inc.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q112895#P1417" title="Modifica su Wikidata"><img alt="Modifica su Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></li></ul> <div class="noprint" style="width:100%; 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