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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Polybasite</span></span>
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</style><table class="infobox"><tbody><tr><th colspan="2" class="infobox-above" style="color:black; background-color: #8BAFDA">Polybasite</th></tr><tr><td colspan="2" class="infobox-image"></td></tr><tr><th colspan="2" class="infobox-header" style="color:black; background-color: #8BAFDA">General</th></tr><tr><th scope="row" class="infobox-label">Category</th><td class="infobox-data"><a href="Sulfosalt_minerals" class="mw-redirect" title="Sulfosalt minerals">Sulfosalt minerals</a></td></tr><tr><th scope="row" class="infobox-label"><a href="Chemical_formula" title="Chemical formula">Formula</a></th><td class="infobox-data"><style data-mw-deduplicate="TemplateStyles:r1123817410">
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</style><span class="chemf nowrap">[(Ag,Cu)<sub class="template-chem2-sub">6</sub>(Sb,As)<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">7</sub>][Ag<sub class="template-chem2-sub">9</sub>CuS<sub class="template-chem2-sub">4</sub>]</span></td></tr><tr><th scope="row" class="infobox-label"><a href="List_of_mineral_symbols" title="List of mineral symbols">IMA symbol</a></th><td class="infobox-data">Plb<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label"><a href="Nickel%E2%80%93Strunz_classification" title="Nickel–Strunz classification">Strunz classification</a></th><td class="infobox-data">2.GB.15</td></tr><tr><th scope="row" class="infobox-label"><a href="Crystal_system" title="Crystal system">Crystal system</a></th><td class="infobox-data"><a href="Monoclinic" class="mw-redirect" title="Monoclinic">Monoclinic</a> and <a href="Trigonal" class="mw-redirect" title="Trigonal">trigonal</a> polytypes</td></tr><tr><th scope="row" class="infobox-label"><a href="Crystal_class" class="mw-redirect" title="Crystal class">Crystal class</a></th><td class="infobox-data">Prismatic (2/m) <br><small>(same <a href="H-M_symbol" class="mw-redirect" title="H-M symbol">H-M symbol</a>)</small></td></tr><tr><th scope="row" class="infobox-label"><a href="Space_group" title="Space group">Space group</a></th><td class="infobox-data"><i>C2/c</i></td></tr><tr><th colspan="2" class="infobox-header" style="color:black; background-color: #8BAFDA">Identification</th></tr><tr><th scope="row" class="infobox-label">Colour</th><td class="infobox-data">steel black</td></tr><tr><th scope="row" class="infobox-label"><a href="Cleavage_(crystal)" title="Cleavage (crystal)">Cleavage</a></th><td class="infobox-data">poor on (001)</td></tr><tr><th scope="row" class="infobox-label"><a href="Fracture_(mineralogy)" title="Fracture (mineralogy)">Fracture</a></th><td class="infobox-data">uneven</td></tr><tr><th scope="row" class="infobox-label"><a href="Mohs_scale_of_mineral_hardness" class="mw-redirect" title="Mohs scale of mineral hardness">Mohs scale</a> hardness</th><td class="infobox-data">1.5–2</td></tr><tr><th scope="row" class="infobox-label"><a href="Lustre_(mineralogy)" title="Lustre (mineralogy)">Lustre</a></th><td class="infobox-data">metallic, adamantine or glimmering</td></tr><tr><th scope="row" class="infobox-label"><a href="Streak_(mineralogy)" title="Streak (mineralogy)">Streak</a></th><td class="infobox-data">black with reddish tint</td></tr><tr><th scope="row" class="infobox-label"><a href="Specific_gravity" class="mw-redirect" title="Specific gravity">Specific gravity</a></th><td class="infobox-data">6–6.2</td></tr><tr><th scope="row" class="infobox-label">References</th><td class="infobox-data"><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><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><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><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup></td></tr></tbody></table>
<p><b>Polybasite</b> is a <a href="Sulfosalt" class="mw-redirect" title="Sulfosalt">sulfosalt</a> mineral of <a href="Silver" title="Silver">silver</a>, <a href="Copper" title="Copper">copper</a>, <a href="Antimony" title="Antimony">antimony</a> and <a href="Arsenic" title="Arsenic">arsenic</a>. Its chemical formula is <span class="chemf nowrap">[(Ag,Cu)<sub class="template-chem2-sub">6</sub>(Sb,As)<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">7</sub>][Ag<sub class="template-chem2-sub">9</sub>CuS<sub class="template-chem2-sub">4</sub>]</span>.
</p><p>It forms black <a href="Monoclinic_crystal_system" title="Monoclinic crystal system">monoclinic</a> crystals (thin, tabular, with six corners) which can show dark red internal reflections. It has a <a href="Mohs_hardness" class="mw-redirect" title="Mohs hardness">Mohs hardness</a> of 2.5 to 3. It is found worldwide and is an <a href="Ore" title="Ore">ore</a> of silver. The name comes from the number of base metals in the mineral.
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<div class="mw-heading mw-heading2"><h2 id="Images">Images</h2></div>
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<div class="gallerytext">Unusual polybasite specimen from Mayo Mining District, <a href="Yukon_Territory" class="mw-redirect" title="Yukon Territory">Yukon Territory</a>, Canada.</div>
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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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</style><cite id="CITEREFWarr2021" class="citation journal cs1">Warr, L.N. (2021). <a rel="nofollow" class="external text" href="https://doi.org/10.1180%2Fmgm.2021.43">"IMA–CNMNC approved mineral symbols"</a>. <i>Mineralogical Magazine</i>. <b>85</b> (3): <span class="nowrap">291–</span>320. <a href="Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2021MinM...85..291W">2021MinM...85..291W</a>. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1180%2Fmgm.2021.43">10.1180/mgm.2021.43</a></span>. <a href="S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:235729616">235729616</a>.</cite></span>
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<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.mindat.org/min-3256.html">Polybasite: mindat.org</a></span>
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<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.webmineral.com/data/Polybasite.shtml">Webmineral.com</a></span>
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<li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20160303171441/http://www.handbookofmineralogy.com/pdfs/polybasite.pdf">"Handbook of Mineralogy"</a> <span class="cs1-format">(PDF)</span>. Archived from <a rel="nofollow" class="external text" href="http://www.handbookofmineralogy.com/pdfs/polybasite.pdf">the original</a> <span class="cs1-format">(PDF)</span> on 2016-03-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2011-05-16</span></span>.</cite></span>
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<li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><cite id="CITEREFRudolf_Dǔd'a_and_Luboš_Rejl1990" class="citation book cs1">Rudolf Dǔd'a and Luboš Rejl (1990). <i>Minerals of the World</i>. Arch Cape Press. p. 40. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0-517-68030-0</bdi>.</cite></span>
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<div class="side-box-text plainlist">Wikimedia Commons has media related to <span style="font-weight: bold; font-style: italic;"><a href="https://commons.wikimedia.org/wiki/Category:Polybasite" class="extiw external" title="commons:Category:Polybasite">Polybasite</a></span>.</div></div>
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