{{Short description|Lead selenide mineral}} {{Infobox mineral | name = Clausthalite | category = Selenide mineral | boxwidth = | image = Clausthalite-207330.jpg | alt = | caption = | formula = PbSe | IMAsymbol = Cth<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|url=https://www.cambridge.org/core/journals/mineralogical-magazine/article/imacnmnc-approved-mineral-symbols/62311F45ED37831D78603C6E6B25EE0A|journal=Mineralogical Magazine|volume=85|issue=3 |pages=291–320|doi=10.1180/mgm.2021.43 |bibcode=2021MinM...85..291W |s2cid=235729616 |doi-access=free|url-access=subscription}}</ref> | molweight = | strunz = 2.CD.10 | dana = 02.08.01.02 | system = Isometric | class = Hexoctahedral (m{{overline|3}}m) <br/>H-M symbol: (4/m {{overline|3}} 2/m) | symmetry = ''Fm''{{overline|3}}m | color = Bluish gray to lead-gray | colour = | habit = Massive to granular with euhedral crystals | twinning = | cleavage = {001} Perfect, {010} Perfect, {100} Perfect | fracture = | tenacity = | mohs = 2.5 | luster = Metallic | streak = grayish black | diaphaneity = opaque | gravity = 7.6–8.8 | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence= | absorption = | melt = | fusibility = | diagnostic = | solubility = | other = | alteration = | references = <ref>[https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Clausthalite Mineralienatlas]</ref><ref name=Handbook>http://rruff.geo.arizona.edu/doclib/hom/clausthalite.pdf Handbook of Mineralogy</ref><ref name=Webmin>http://webmineral.com/data/Clausthalite.shtml Webmineral data</ref><ref name=Mindat>http://www.mindat.org/min-1061.html Mindat</ref> }} '''Clausthalite''' is a lead selenide mineral, PbSe. It forms a solid solution series with galena PbS.
==Occurrence== It occurs in low-sulfur hydrothermal deposits with other selenides and in mercury deposits. It is associated with tiemannite, klockmannite, berzelianite, umangite, gold, stibiopalladinite and uraninite.<ref name=Handbook/>
It was first described in 1832 and named for the discovery locality of Clausthal-Zellerfeld in the Harz Mountains, Germany.<ref name=Mindat/>
==See also== {{Portal|Earth sciences}} * Classification of minerals * List of minerals
==References== {{Reflist}}
{{Commons category}}
Category:Lead minerals Category:Selenide minerals Category:Galena group
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