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<div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</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="en" dir="ltr"><p> <style data-mw-deduplicate="TemplateStyles:r1084375498">.mw-parser-output .ib-chembox{border-collapse:collapse;text-align:left}.mw-parser-output .ib-chembox td,.mw-parser-output .ib-chembox th{border:1px solid #a2a9b1;width:40%}.mw-parser-output .ib-chembox td+td{width:60%}</style> </p> <table class="infobox ib-chembox"> <caption>Caesium selenide </caption> <tbody><tr> <td colspan="2" style="text-align:center; padding:2px;"><span typeof="mw:File"><a href="/wiki/File:CaF2_polyhedra.png" class="mw-file-description" title="Caesium selenide"><img alt="Caesium selenide" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3f/CaF2_polyhedra.png/250px-CaF2_polyhedra.png" decoding="async" width="250" height="167" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3f/CaF2_polyhedra.png/375px-CaF2_polyhedra.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3f/CaF2_polyhedra.png/500px-CaF2_polyhedra.png 2x" data-file-width="1417" data-file-height="945" /></a></span><br /><div style="text-align:center">Cs<sup>+</sup>: <span style="color:#99CC00; background-color:#99CC00;">__</span> Se<sup>2-</sup>: <span style="color:#C0C0C0; background-color:#C0C0C0;">__</span></div> </td></tr> <tr> <th colspan="2" style="background: #f8eaba; text-align: center;">Identifiers </th></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/CAS_Registry_Number" title="CAS Registry Number">CAS Number</a></div> </td> <td><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"><ul><li><span title="commonchemistry.cas.org"><a rel="nofollow" class="external text" href="https://commonchemistry.cas.org/detail?cas_rn=31052-46-7">31052-46-7</a></span><sup> <span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></li></ul></div> </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">3D model (<a href="/wiki/JSmol" class="mw-redirect" title="JSmol">JSmol</a>)</div> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span title="chemapps.stolaf.edu (3D interactive model)"><a rel="nofollow" class="external text" href="https://chemapps.stolaf.edu/jmol/jmol.php?model=%5BSe-2%5D.%5BCs%2B%5D.%5BCs%2B%5D">Interactive image</a></span></li></ul></div> </td></tr> <tr> <td><a href="/wiki/ChemSpider" title="ChemSpider">ChemSpider</a> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span title="www.chemspider.com"><a rel="nofollow" class="external text" href="https://www.chemspider.com/Chemical-Structure.148025.html">148025</a></span></li></ul></div> </td></tr> <tr> <td><a href="/wiki/ECHA_InfoCard" class="mw-redirect" title="ECHA InfoCard"><span title="echa.europa.eu">ECHA InfoCard</span></a> </td> <td><a rel="nofollow" class="external text" href="https://echa.europa.eu/substance-information/-/substanceinfo/100.045.848">100.045.848</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q15935192#P2566" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span> </td></tr> <tr> <td><a href="/wiki/European_Community_number" title="European Community number"><span title="European Community number (chemical identifier)">EC Number</span></a> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li>250-448-8</li></ul></div> </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/PubChem" title="PubChem">PubChem</a> <abbr title="Compound ID">CID</abbr></div> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span title="pubchem.ncbi.nlm.nih.gov"><a rel="nofollow" class="external text" href="https://pubchem.ncbi.nlm.nih.gov/compound/169244">169244</a></span></li></ul></div> </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/CompTox_Chemicals_Dashboard" title="CompTox Chemicals Dashboard">CompTox Dashboard</a> <span style="font-weight:normal">(<abbr title="U.S. Environmental Protection Agency">EPA</abbr>)</span></div> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span title="comptox.epa.gov"><a rel="nofollow" class="external text" href="https://comptox.epa.gov/dashboard/chemical/details/DTXSID70953155">DTXSID70953155</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q15935192#P3117" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span></li></ul></div> </td></tr> <tr> <td colspan="2"><div class="collapsible-list mw-collapsible mw-collapsed" style="text-align: left;"> <div style="line-height: 1.6em; font-weight: bold; text-align:left; font-weight:normal; background:transparent;"><div><a href="/wiki/International_Chemical_Identifier" title="International Chemical Identifier">InChI</a></div></div> <ul class="mw-collapsible-content" style="margin-top: 0; margin-bottom: 0; line-height: inherit; list-style: none; margin-left: 0; word-break:break-all;"><li style="line-height: inherit; margin: 0"><div style="border-top:1px solid #ccc; padding:0.2em 0 0.2em 1.5em; text-align:left;"><div style="word-wrap:break-word; text-indent:-1.5em; font-size:97%; line-height:120%;">InChI=1S/2Cs.Se/q2*+1;-2</div><div style="word-wrap:break-word; text-indent:-1.5em; font-size:97%; line-height:120%;">Key: KUBAIENASCDSDJ-UHFFFAOYSA-N</div></div></li></ul> </div> </td></tr> <tr> <td colspan="2"><div class="collapsible-list mw-collapsible mw-collapsed" style="text-align: left;"> <div style="line-height: 1.6em; font-weight: bold; text-align:left; font-weight:normal; background:transparent;"><div><a href="/wiki/Simplified_molecular-input_line-entry_system" class="mw-redirect" title="Simplified molecular-input line-entry system">SMILES</a></div></div> <ul class="mw-collapsible-content" style="margin-top: 0; margin-bottom: 0; line-height: inherit; list-style: none; margin-left: 0; word-break:break-all;"><li style="line-height: inherit; margin: 0"><div style="border-top:1px solid #ccc; padding:0.2em 0 0.2em 1.6em; word-wrap:break-word; text-indent:-1.5em; text-align:left; font-size:97%; line-height:120%;">[Se-2].[Cs+].[Cs+]</div></li></ul> </div> </td></tr> <tr> <th colspan="2" style="background: #f8eaba; text-align: center;">Properties </th></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Chemical_formula" title="Chemical formula">Chemical formula</a></div> </td> <td>Cs<sub>2</sub>Se  </td></tr> <tr> <td><a href="/wiki/Molar_mass" title="Molar mass">Molar mass</a> </td> <td>344.771    </td></tr> <tr> <td>Appearance </td> <td>colourless, highly hygroscopic crystals<sup id="cite_ref-Lax_1-0" class="reference"><a href="#cite_note-Lax-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Density" title="Density">Density</a> </td> <td>4.33 g·cm<sup>−3</sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Aqueous_solution" title="Aqueous solution">Solubility in water</a></div> </td> <td>hydroyses<sup id="cite_ref-Alfa_3-0" class="reference"><a href="#cite_note-Alfa-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <th colspan="2" style="background: #f8eaba; text-align: center;">Hazards </th></tr> <tr> <td colspan="2" style="text-align:left; background-color:#eaeaea;"><a href="/wiki/Globally_Harmonized_System_of_Classification_and_Labelling_of_Chemicals" title="Globally Harmonized System of Classification and Labelling of Chemicals"><b>GHS</b> labelling</a>:<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td style="padding-left:1em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/GHS_hazard_pictograms" title="GHS hazard pictograms">Pictograms</a></div> </td> <td><span typeof="mw:File"><a href="/wiki/File:GHS-pictogram-skull.svg" class="mw-file-description" title="GHS06: Toxic"><img alt="GHS06: Toxic" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/GHS-pictogram-skull.svg/50px-GHS-pictogram-skull.svg.png" decoding="async" width="50" height="50" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/GHS-pictogram-skull.svg/75px-GHS-pictogram-skull.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/58/GHS-pictogram-skull.svg/100px-GHS-pictogram-skull.svg.png 2x" data-file-width="724" data-file-height="724" /></a></span><span typeof="mw:File"><a href="/wiki/File:GHS-pictogram-silhouette.svg" class="mw-file-description" title="GHS08: Health hazard"><img alt="GHS08: Health hazard" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/21/GHS-pictogram-silhouette.svg/50px-GHS-pictogram-silhouette.svg.png" decoding="async" width="50" height="50" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/21/GHS-pictogram-silhouette.svg/75px-GHS-pictogram-silhouette.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/21/GHS-pictogram-silhouette.svg/100px-GHS-pictogram-silhouette.svg.png 2x" data-file-width="724" data-file-height="724" /></a></span><span typeof="mw:File"><a href="/wiki/File:GHS-pictogram-pollu.svg" class="mw-file-description" title="GHS09: Environmental hazard"><img alt="GHS09: Environmental hazard" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b9/GHS-pictogram-pollu.svg/50px-GHS-pictogram-pollu.svg.png" decoding="async" width="50" height="50" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b9/GHS-pictogram-pollu.svg/75px-GHS-pictogram-pollu.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b9/GHS-pictogram-pollu.svg/100px-GHS-pictogram-pollu.svg.png 2x" data-file-width="724" data-file-height="724" /></a></span> </td></tr> <tr> <td style="padding-left:1em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Globally_Harmonized_System_of_Classification_and_Labelling_of_Chemicals#Signal_word" title="Globally Harmonized System of Classification and Labelling of Chemicals">Signal word</a></div> </td> <td><b>Danger</b> </td></tr> <tr> <td style="padding-left:1em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/GHS_hazard_statements" title="GHS hazard statements">Hazard statements</a></div> </td> <td><abbr class="abbr" title="H301: Toxic if swallowed">H301</abbr>, <abbr class="abbr" title="H331: Toxic if inhaled">H331</abbr>, <abbr class="abbr" title="H373: May cause damage to organs through prolonged or repeated exposure">H373</abbr>, <abbr class="abbr" title="H410: Very toxic to aquatic life with long lasting effects">H410</abbr> </td></tr> <tr> <th colspan="2" style="background: #f8eaba; text-align: center;">Related compounds </th></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Other <a href="/wiki/Ion" title="Ion">anions</a></div> </td> <td><a href="/wiki/Caesium_oxide" title="Caesium oxide">Caesium oxide</a><br /><a href="/wiki/Caesium_sulfide" title="Caesium sulfide">Caesium sulfide</a><br /><a href="/wiki/Caesium_sulfide" title="Caesium sulfide">Caesium sulfide</a><br /><a href="/w/index.php?title=Caesium_polonide&action=edit&redlink=1" class="new" title="Caesium polonide (page does not exist)">Caesium polonide</a> </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Other <a href="/wiki/Ion" title="Ion">cations</a></div> </td> <td><a href="/wiki/Lithium_selenide" title="Lithium selenide">lithium selenide</a><br /><a href="/wiki/Sodium_selenide" title="Sodium selenide">sodium selenide</a><br /><a href="/wiki/Potassium_selenide" title="Potassium selenide">potassium selenide</a><br /><a href="/wiki/Rubidium_selenide" title="Rubidium selenide">rubidium selenide</a> </td></tr> <tr> <td colspan="2" style="text-align:left; background:#f8eaba; border:1px solid #a2a9b1;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Except where otherwise noted, data are given for materials in their <a href="/wiki/Standard_state" title="Standard state">standard state</a> (at 25 °C [77 °F], 100 kPa).</div> <div style="margin-top: 0.3em;"></div> <div style="margin-top: 0.3em; text-align: center;"><a href="/wiki/Wikipedia:Chemical_infobox#References" title="Wikipedia:Chemical infobox">Infobox references</a></div> </td></tr> </tbody></table><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Chemical compound</div> <p><b>Caesium selenide</b> is an inorganic compound of <a href="/wiki/Caesium" title="Caesium">caesium</a> and <a href="/wiki/Selenium" title="Selenium">selenium</a>. It is a <a href="/wiki/Selenide" title="Selenide">selenide</a>, with the chemical formula of Cs<sub>2</sub>Se. It can be prepared by reacting caesium and selenium. It has an inverse <a href="/wiki/Fluorite" title="Fluorite">fluorite</a> structure, with <a href="/wiki/Space_group" title="Space group">space group</a> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle Fm{\bar {3}}m}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>F</mi> <mi>m</mi> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mn>3</mn> <mo stretchy="false">¯</mo> </mover> </mrow> </mrow> <mi>m</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle Fm{\bar {3}}m}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/ee2f165fc36722415a5dbf5958e4a79c1aaa5d57" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:6.984ex; height:2.509ex;" alt="{\displaystyle Fm{\bar {3}}m}"></span>. There are 4 units per unit cell,<sup id="cite_ref-Lax_1-1" class="reference"><a href="#cite_note-Lax-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> and the other selenides from the same group are similar. </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Caesium_selenide&action=edit&section=1" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-Lax-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-Lax_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Lax_1-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text">Jean D'Ans, Ellen Lax: <i>Taschenbuch für Chemiker und Physiker. 3. Elemente, anorganische Verbindungen und Materialien, Minerale, Band 3.</i> 4. Auflage, Springer, 1997, ISBN 978-3-5406-0035-0, S. 692 (<i><a rel="nofollow" class="external autonumber" href="https://books.google.com/books?id=&pg=PA692">[1]</a></i>, p. 692, at <a href="/wiki/Google_Books" title="Google Books">Google Books</a>).</span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text">Sommer, Helmut; Hoppe, Rudolf. The crystal structure of cesium sulfide and a remark about cesium selenide, cesium telluride, rubidium selenide, and rubidium telluride<span class="languageicon">(in German)</span>. <i>Zeitschrift fuer Anorganische und Allgemeine Chemie</i>, 1977. 429: 118–130. ISSN: 0044-2313</span> </li> <li id="cite_note-Alfa-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-Alfa_3-0">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.alfa.com/de/catalog/39515">Caesium selenide</a> at AlfaAesar, accessed on Dienstag, 29 June 2010 (<a rel="nofollow" class="external text" href="https://www.alfa.com/de/msds/?language=DE&subformat=CLP1&sku=39515">PDF</a>) (JavaScript required).<sup class="noprint Inline-Template"><span style="white-space: nowrap;">[<i><a href="/wiki/Wikipedia:Link_rot" title="Wikipedia:Link rot"><span title=" Dead link tagged January 2024">dead link</span></a></i><span style="visibility:hidden; color:transparent; padding-left:2px">‍</span>]</span></sup></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><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><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://echa.europa.eu/information-on-chemicals/cl-inventory-database/-/discli/details/153441">"C&L Inventory"</a>. <i>echa.europa.eu</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=echa.europa.eu&rft.atitle=C%26L+Inventory&rft_id=https%3A%2F%2Fecha.europa.eu%2Finformation-on-chemicals%2Fcl-inventory-database%2F-%2Fdiscli%2Fdetails%2F153441&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACaesium+selenide" class="Z3988"></span></span> </li> </ol></div></div> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist 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.navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Caesium_compounds" title="Template:Caesium compounds"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Caesium_compounds" title="Template talk:Caesium compounds"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Caesium_compounds" title="Special:EditPage/Template:Caesium compounds"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Caesium_compounds" style="font-size:114%;margin:0 4em"><a href="/wiki/Caesium_compounds" class="mw-redirect" title="Caesium compounds">Caesium compounds</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Caesium_dibismuthide" title="Caesium dibismuthide">CsBi<sub>2</sub></a></li> <li><a href="/wiki/Caesium_bromide" title="Caesium bromide">CsBr</a></li> <li><a href="/wiki/Caesium_chloride" title="Caesium chloride">CsCl</a></li> <li><a href="/wiki/Caesium_cyanide" title="Caesium cyanide">CsCN</a></li> <li><a href="/wiki/Caesium_perchlorate" title="Caesium perchlorate">CsClO<sub>4</sub></a></li> <li><a href="/wiki/Caesium_chromate" title="Caesium chromate">Cs<sub>2</sub>CrO<sub>4</sub></a></li> <li><a href="/wiki/Caesium_hexafluorocobaltate(IV)" title="Caesium hexafluorocobaltate(IV)">Cs<sub>2</sub>CoF<sub>6</sub></a></li> <li><a href="/wiki/Caesium_hexafluorocuprate(IV)" title="Caesium hexafluorocuprate(IV)">Cs<sub>2</sub>CuF<sub>6</sub></a></li> <li><a href="/wiki/Caesium_fluoride" title="Caesium fluoride">CsF</a></li> <li><a href="/wiki/Caesium_hydride" title="Caesium hydride">CsH</a></li> <li><a href="/wiki/Caesium_iodide" title="Caesium iodide">CsI</a></li> <li><a href="/wiki/Caesium_triiodide" title="Caesium triiodide">CsI<sub>3</sub></a></li> <li><a href="/wiki/Caesium_lithium_borate" title="Caesium lithium borate">CsLiB<sub>6</sub>O<sub>10</sub></a></li> <li><a href="/wiki/Caesium_azide" title="Caesium azide">CsN<sub>3</sub></a></li> <li><a href="/wiki/Caesium_nitrate" title="Caesium nitrate">CsNO<sub>3</sub></a></li> <li><a href="/wiki/Caesium_hydroxide" title="Caesium hydroxide">CsOH</a></li> <li><a href="/wiki/Caesium_carbonate" title="Caesium carbonate">Cs<sub>2</sub>CO<sub>3</sub></a></li> <li><a href="/wiki/Caesium_bicarbonate" title="Caesium bicarbonate">CsHCO<sub>3</sub></a></li> <li><a href="/wiki/Caesium_oxalate" title="Caesium oxalate">Cs<sub>2</sub>C<sub>2</sub>O<sub>4</sub></a></li> <li><a href="/wiki/Caesium_sulfate" title="Caesium sulfate">Cs<sub>2</sub>SO<sub>4</sub></a></li> <li><a href="/wiki/Caesium_sulfide" title="Caesium sulfide">Cs<sub>2</sub>S</a></li> <li><a href="/wiki/Caesium_selenate" title="Caesium selenate">Cs<sub>2</sub>SeO<sub>4</sub></a></li> <li><a class="mw-selflink selflink">Cs<sub>2</sub>Se</a></li> <li><a href="/wiki/Caesium_acetate" title="Caesium acetate">CsC<sub>2</sub>H<sub>3</sub>O<sub>2</sub></a></li> <li><a href="/wiki/Caesium_monoxide" title="Caesium monoxide">Cs<sub>2</sub>O</a></li> <li><a href="/wiki/Caesium_peroxide" title="Caesium peroxide">Cs<sub>2</sub>O<sub>2</sub></a></li> <li><a href="/wiki/Caesium_phosphide" title="Caesium phosphide"><span class="chemf nowrap">Cs<sub class="template-chem2-sub">2</sub>P<sub class="template-chem2-sub">5</sub></span></a></li> <li><a href="/wiki/Caesium_sesquioxide" title="Caesium sesquioxide">Cs<sub>2</sub>O<sub>3</sub></a></li> <li><a href="/wiki/Caesium_superoxide" title="Caesium superoxide">CsO<sub>2</sub></a></li> <li><a href="/wiki/Caesium_ozonide" title="Caesium ozonide">CsO<sub>3</sub></a></li> <li><a href="/wiki/Cesium_telluride" class="mw-redirect" title="Cesium telluride">Cs<sub>2</sub>Te</a></li> <li><a href="/wiki/Caesium_titanate" title="Caesium titanate">Cs<sub>2</sub>TiO<sub>3</sub></a></li> <li><a href="/wiki/Caesium_tungstate" title="Caesium tungstate">Cs<sub>2</sub>WO<sub>4</sub></a></li> <li><a href="/wiki/Caesium_auride" title="Caesium auride">CsAu</a></li> <li><a href="/wiki/Caesium_stearate" title="Caesium stearate">C<sub>18</sub>H<sub>35</sub>CsO<sub>2</sub></a></li> <li><a href="/wiki/Caesium_permanganate" title="Caesium permanganate">CsMnO<sub>4</sub></a></li> <li><a href="/wiki/Caesium_pertechnetate" title="Caesium pertechnetate">CsTcO<sub>4</sub></a></li> <li><a href="/wiki/Caesium_dodecaborate" title="Caesium dodecaborate">Cs<sub>2</sub>B<sub>12</sub>H<sub>12</sub></a></li> <li><a href="/wiki/Caesium_bisulfate" title="Caesium bisulfate">CsHSO<sub>4</sub></a></li> <li><a href="/wiki/Caesium_enneabromodibismuthate" title="Caesium enneabromodibismuthate">Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub></a></li> <li><a href="/wiki/Caesium_heptafluoroxenate" title="Caesium heptafluoroxenate"><span class="chemf nowrap">CsXeF<sub class="template-chem2-sub">7</sub></span></a></li> <li><a href="/wiki/Dicaesium_silver_hexabromobismuthate" title="Dicaesium silver hexabromobismuthate">Cs<sub>2</sub>AgBiBr<sub>6</sub></a></li> <li><a href="/wiki/Cesium_zirconate" class="mw-redirect" title="Cesium zirconate"><span class="chemf nowrap">Cs<sub class="template-chem2-sub">2</sub>ZrO<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Caesium_fluoroaluminate" title="Caesium fluoroaluminate"><span class="chemf nowrap">AlCsF<sub class="template-chem2-sub">5</sub></span></a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Salts_and_covalent_derivatives_of_the_selenide_ion" style="display:table;;padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit;table-layout:fixed;"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Selenides" title="Template:Selenides"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Selenides" title="Template talk:Selenides"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Selenides" title="Special:EditPage/Template:Selenides"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Salts_and_covalent_derivatives_of_the_selenide_ion" style="font-size:114%;margin:0 4em">Salts and covalent derivatives of the <a href="/wiki/Selenide" title="Selenide">selenide</a> ion</div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0;border-width:0;"><div style="padding:0"><div class="mw-collapsible-content" style="overflow-x:auto"> <table class="center"> <tbody><tr style="background-color:mistyrose"> <td><a href="/wiki/Hydrogen_selenide" title="Hydrogen selenide">H<sub>2</sub>Se</a><br /><a href="/wiki/Hydrogen_diselenide" title="Hydrogen diselenide">H<sub>2</sub>Se<sub>2</sub></a><br /><a href="/wiki/Hydride_selenide" title="Hydride selenide">+H</a><br /><a href="/wiki/Hydroselenide" title="Hydroselenide">-H</a> </td> <td style="background-color:white;border:none"> </td> <td style="background-color:white;border:none" colspan="11" rowspan="3"> </td> <td style="background-color:white;border:none" colspan="5"> </td> <td>He </td></tr> <tr style="background-color:mistyrose"> <td><a href="/wiki/Lithium_selenide" title="Lithium selenide">Li<sub>2</sub>Se</a> </td> <td>Be </td> <td><a href="/wiki/Selenide_borate" title="Selenide borate">Se<sub><span class="texhtml mvar" style="font-style:italic;">x</span></sub>B<sub><span class="texhtml mvar" style="font-style:italic;">y</span></sub>O<sub><span class="texhtml mvar" style="font-style:italic;">z</span></sub></a> </td> <td><a href="/wiki/Carbon_diselenide" title="Carbon diselenide">CSe<sub>2</sub></a><br /><a href="/wiki/Carbonyl_selenide" title="Carbonyl selenide">OCSe</a><br /><a href="/wiki/Dimethyl_selenide" title="Dimethyl selenide">(CH<sub>3</sub>)<sub>2</sub>Se</a> </td> <td><a href="/wiki/Ammonium_selenide" title="Ammonium selenide">(NH<sub>4</sub>)<sub>2</sub>Se</a> </td> <td>O </td> <td>F </td> <td>Ne </td></tr> <tr style="background-color:mistyrose"> <td><a href="/wiki/Sodium_selenide" title="Sodium selenide">Na<sub>2</sub>Se</a> </td> <td><a href="/wiki/Magnesium_selenide" title="Magnesium selenide">MgSe</a> </td> <td><a href="/wiki/Aluminium_selenide" title="Aluminium selenide">Al<sub>2</sub>Se<sub>3</sub></a> </td> <td>Si </td> <td><a href="/wiki/Phosphorus_selenide" title="Phosphorus selenide">P<sub><span class="texhtml mvar" style="font-style:italic;">x</span></sub>Se<sub><span class="texhtml mvar" style="font-style:italic;">y</span></sub></a><br /><a href="/wiki/Selenophosphate" title="Selenophosphate">-P</a> </td> <td><a href="/wiki/Sulfoselenide" class="mw-redirect" title="Sulfoselenide">+S</a> </td> <td>Cl </td> <td>Ar </td></tr> <tr style="background-color:mistyrose"> <td><a href="/wiki/Potassium_selenide" title="Potassium selenide">K<sub>2</sub>Se</a> </td> <td><a href="/wiki/Calcium_selenide" title="Calcium selenide">CaSe</a> </td> <td style="background-color:white;border:none"> </td> <td><a href="/w/index.php?title=Scandium_selenide&action=edit&redlink=1" class="new" title="Scandium selenide (page does not exist)">Sc<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/wiki/Titanium_diselenide" title="Titanium diselenide">TiSe<sub>2</sub></a> </td> <td>V </td> <td><a href="/wiki/Chromium(II)_selenide" title="Chromium(II) selenide">CrSe</a><br /><a href="/w/index.php?title=Chromium(III)_selenide&action=edit&redlink=1" class="new" title="Chromium(III) selenide (page does not exist)">Cr<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/wiki/Manganese(II)_selenide" title="Manganese(II) selenide">MnSe</a><br /><a href="/wiki/Manganese_diselenide" title="Manganese diselenide">MnSe<sub>2</sub></a> </td> <td><a href="/wiki/Iron(II)_selenide" title="Iron(II) selenide">FeSe</a> </td> <td><a href="/wiki/Cobalt(II)_selenide" title="Cobalt(II) selenide">CoSe</a> </td> <td><a href="/wiki/Nickel_selenide" title="Nickel selenide">NiSe</a> </td> <td><a href="/wiki/Copper_selenide" title="Copper selenide">CuSe</a> </td> <td><a href="/wiki/Zinc_selenide" title="Zinc selenide">ZnSe</a> </td> <td><a href="/wiki/Gallium(II)_selenide" title="Gallium(II) selenide">GaSe</a><br /><a href="/wiki/Gallium(III)_selenide" title="Gallium(III) selenide">Ga<sub>2</sub>Se<sub>3</sub></a><br /><a href="/wiki/Selenogallate" title="Selenogallate">-Ga</a> </td> <td><a href="/wiki/Germanium_monoselenide" title="Germanium monoselenide">GeSe</a><br /><a href="/wiki/Germanium_diselenide" title="Germanium diselenide">GeSe<sub>2</sub></a><br /><a href="/wiki/Selenidogermanate" title="Selenidogermanate">-Ge</a> </td> <td><a href="/wiki/Arsenic_triselenide" title="Arsenic triselenide">As<sub>2</sub>Se<sub>3</sub></a><br /><a href="/w/index.php?title=Tetraarsenic_triselenide&action=edit&redlink=1" class="new" title="Tetraarsenic triselenide (page does not exist)">As<sub>4</sub>Se<sub>3</sub></a> </td> <td><a href="/wiki/Polyselenide" title="Polyselenide">Se<span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1.2em;font-size:80%;text-align:left"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline">2−</sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline"><i>n</i></sub></span></span></a> </td> <td>Br </td> <td>Kr </td></tr> <tr style="background-color:mistyrose"> <td><a href="/wiki/Rubidium_selenide" title="Rubidium selenide">Rb<sub>2</sub>Se<sub></sub></a> </td> <td><a href="/wiki/Strontium_selenide" title="Strontium selenide">SrSe</a> </td> <td style="background-color:white;border:none"> </td> <td><a href="/w/index.php?title=Yttrium_selenide&action=edit&redlink=1" class="new" title="Yttrium selenide (page does not exist)">Y<sub>2</sub>Se<sub>3</sub></a> </td> <td>Zr </td> <td><a href="/wiki/Niobium_diselenide" title="Niobium diselenide">NbSe<sub>2</sub></a><br /><a href="/wiki/Niobium_triselenide" title="Niobium triselenide">NbSe<sub>3</sub></a> </td> <td><a href="/wiki/Molybdenum_diselenide" title="Molybdenum diselenide">MoSe<sub>2</sub></a> </td> <td>Tc </td> <td>Ru </td> <td>Rh </td> <td>Pd </td> <td><a href="/wiki/Silver(I)_selenide" title="Silver(I) selenide">Ag<sub>2</sub>Se</a> </td> <td><a href="/wiki/Cadmium_selenide" title="Cadmium selenide">CdSe</a> </td> <td><a href="/wiki/Indium(III)_selenide" title="Indium(III) selenide">In<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/wiki/Tin_selenide" title="Tin selenide">SnSe</a><br /><a href="/w/index.php?title=Tin(IV)_selenide&action=edit&redlink=1" class="new" title="Tin(IV) selenide (page does not exist)">SnSe<sub>2</sub></a><br /><a href="/wiki/Selenidostannate" title="Selenidostannate">-Sn</a> </td> <td><a href="/wiki/Antimony_triselenide" title="Antimony triselenide">Sb<sub>2</sub>Se<sub>3</sub></a> </td> <td>Te </td> <td><a href="/wiki/Selenide_iodide" title="Selenide iodide">+I</a> </td> <td>Xe </td></tr> <tr style="background-color:mistyrose"> <td><a class="mw-selflink selflink">Cs<sub>2</sub>Se</a> </td> <td><a href="/wiki/Barium_selenide" title="Barium selenide">BaSe</a> </td> <td style="background-color:white;border:none">* </td> <td><a href="/w/index.php?title=Lutetium_monoselenide&action=edit&redlink=1" class="new" title="Lutetium monoselenide (page does not exist)">LuSe</a><br /><a href="/wiki/Lutetium(III)_selenide" title="Lutetium(III) selenide">Lu<sub>2</sub>Se<sub>3</sub></a> </td> <td>Hf </td> <td><a href="/wiki/Tantalum_diselenide" title="Tantalum diselenide">TaSe<sub>2</sub></a> </td> <td><a href="/wiki/Tungsten_diselenide" title="Tungsten diselenide">WSe<sub>2</sub></a><br /><a href="/w/index.php?title=Tungsten_triselenide&action=edit&redlink=1" class="new" title="Tungsten triselenide (page does not exist)">WSe<sub>3</sub></a> </td> <td><a href="/wiki/Rhenium_diselenide" title="Rhenium diselenide">ReSe<sub>2</sub></a> </td> <td>Os </td> <td>Ir </td> <td><a href="/wiki/Platinum_diselenide" title="Platinum diselenide">PtSe<sub>2</sub></a> </td> <td>Au </td> <td><a href="/wiki/Mercury_selenide" title="Mercury selenide">HgSe</a> </td> <td><a href="/w/index.php?title=Thallium_selenide&action=edit&redlink=1" class="new" title="Thallium selenide (page does not exist)">Tl<sub>2</sub>Se</a> </td> <td><a href="/wiki/Lead_selenide" title="Lead selenide">PbSe</a> </td> <td><a href="/wiki/Bismuth_selenide" title="Bismuth selenide">Bi<sub>2</sub>Se<sub>3</sub></a> </td> <td>Po </td> <td>At </td> <td>Rn </td></tr> <tr style="background-color:mistyrose"> <td>Fr </td> <td>Ra </td> <td style="background-color:white;border:none">** </td> <td>Lr </td> <td>Rf </td> <td>Db </td> <td>Sg </td> <td>Bh </td> <td>Hs </td> <td>Mt </td> <td>Ds </td> <td>Rg </td> <td><a href="/w/index.php?title=Copernicium_selenide&action=edit&redlink=1" class="new" title="Copernicium selenide (page does not exist)">CnSe</a> </td> <td>Nh </td> <td>Fl </td> <td>Mc </td> <td>Lv </td> <td>Ts </td> <td>Og </td></tr> <tr> <td style="background-color:white;border:none" colspan="2" rowspan="3"> </td> <td style="background-color:white;border:none" colspan="20">  </td></tr> <tr style="background-color:mistyrose"> <td style="background-color:white;border:none">* </td> <td><a href="/w/index.php?title=Lanthanum_monoselenide&action=edit&redlink=1" class="new" title="Lanthanum monoselenide (page does not exist)">LaSe</a><br /><a href="/w/index.php?title=Lanthanum(III)_selenide&action=edit&redlink=1" class="new" title="Lanthanum(III) selenide (page does not exist)">La<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/wiki/Cerium_monoselenide" title="Cerium monoselenide">CeSe</a><br /><a href="/w/index.php?title=Cerium(III)_selenide&action=edit&redlink=1" class="new" title="Cerium(III) selenide (page does not exist)">Ce<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/wiki/Praseodymium_monoselenide" title="Praseodymium monoselenide">PrSe</a><br /><a href="/w/index.php?title=Praseodymium(III)_selenide&action=edit&redlink=1" class="new" title="Praseodymium(III) selenide (page does not exist)">Pr<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/w/index.php?title=Neodymium_monoselenide&action=edit&redlink=1" class="new" title="Neodymium monoselenide (page does not exist)">NdSe</a><br /><a href="/w/index.php?title=Neodymium(III)_selenide&action=edit&redlink=1" class="new" title="Neodymium(III) selenide (page does not exist)">Nd<sub>2</sub>Se<sub>3</sub></a> </td> <td>Pm </td> <td><a href="/wiki/Samarium(II)_selenide" class="mw-redirect" title="Samarium(II) selenide">SmSe</a><br /><a href="/w/index.php?title=Samarium(III)_selenide&action=edit&redlink=1" class="new" title="Samarium(III) selenide (page does not exist)">Sm<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/wiki/Europium_monoselenide" title="Europium monoselenide">EuSe</a><br /><a href="/wiki/Europium(III)_selenide" title="Europium(III) selenide">Eu<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/w/index.php?title=Gadolinium_monoselenide&action=edit&redlink=1" class="new" title="Gadolinium monoselenide (page does not exist)">GdSe</a><br /><a href="/w/index.php?title=Gadolinium(III)_selenide&action=edit&redlink=1" class="new" title="Gadolinium(III) selenide (page does not exist)">Gd<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/wiki/Terbium_monoselenide" title="Terbium monoselenide">TbSe</a><br /><a href="/w/index.php?title=Terbium(III)_selenide&action=edit&redlink=1" class="new" title="Terbium(III) selenide (page does not exist)">Tb<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/w/index.php?title=Dysprosium_monoselenide&action=edit&redlink=1" class="new" title="Dysprosium monoselenide (page does not exist)">DySe</a><br /><a href="/wiki/Dysprosium(III)_selenide" title="Dysprosium(III) selenide">Dy<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/w/index.php?title=Holmium_monoselenide&action=edit&redlink=1" class="new" title="Holmium monoselenide (page does not exist)">HoSe</a><br /><a href="/wiki/Holmium(III)_selenide" title="Holmium(III) selenide">Ho<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/w/index.php?title=Erbium_monoselenide&action=edit&redlink=1" class="new" title="Erbium monoselenide (page does not exist)">ErSe</a><br /><a href="/wiki/Erbium(III)_selenide" title="Erbium(III) selenide">Er<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/wiki/Thulium_monoselenide" title="Thulium monoselenide">TmSe</a><br /><a href="/wiki/Thulium(III)_selenide" title="Thulium(III) selenide">Tm<sub>2</sub>Se<sub>3</sub></a> </td> <td><a href="/w/index.php?title=Ytterbium_monoselenide&action=edit&redlink=1" class="new" title="Ytterbium monoselenide (page does not exist)">YbSe</a><br /><a href="/w/index.php?title=Ytterbium(III)_selenide&action=edit&redlink=1" class="new" title="Ytterbium(III) selenide (page does not exist)">Yb<sub>2</sub>Se<sub>3</sub></a> </td></tr> <tr style="background-color:mistyrose"> <td style="background-color:white;border:none">** </td> <td>Ac </td> <td><a href="/wiki/Thorium_diselenide" title="Thorium diselenide">ThSe<sub>2</sub></a> </td> <td>Pa </td> <td><a href="/wiki/Uranium_diselenide" title="Uranium diselenide">USe<sub>2</sub></a> </td> <td>Np </td> <td><a href="/wiki/Plutonium_selenide" title="Plutonium selenide">PuSe</a> </td> <td>Am </td> <td>Cm </td> <td>Bk </td> <td>Cf </td> <td>Es </td> <td>Fm </td> <td>Md </td> <td>No </td></tr></tbody></table></div> </div></td></tr></tbody></table></div>    </div><noscript><img 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