{{Infobox mineral | name = Stilleite | boxwidth = | boxbgcolor = | image = Stilleite.jpg | imagesize = | alt = | caption = Single crystal aggregates of stilleite from the Shinkolobwe deposit | category = Selenide mineral | formula = ZnSe | IMAsymbol = Sll<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|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}}</ref> | molweight = | strunz = 2.CB.05a | system = Cubic | class = Hextetrahedral ({{overline|4}}3m) <br/>H-M symbol: ({{overline|4}} 3m) | symmetry = ''F''{{overline|4}}3m | unit cell = a = 5.667 Å; Z = 4 | color = Gray | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | mohs = 5 | luster = Metallic | streak = | diaphaneity = Opaque to translucent | gravity = 5.42 | density = | polish = | opticalprop = Isotropic | refractive = About 2.5 | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references =<ref name=HBM>[http://www.handbookofmineralogy.com/pdfs/stilleite.pdf Handbook of Mineralogy – Stilleite]</ref><ref>[http://www.mindat.org/min-3786.html Mindat.org – Stilleite]</ref> | SMILES = [SeH+2]12[ZnH2-2][SeH+2]3[ZnH2-2][SeH+2]([ZnH-2]14)[ZnH-2]1[Se+2]5([ZnH-2]38)[Zn-2]26[SeH+2]2[ZnH-2]([Se+2]4)[SeH+2]1[ZnH2-2][SeH+2]3[ZnH-2]2[Se+2][ZnH-2]([SeH+2]6[ZnH-2]([SeH+2])[SeH+2]68)[SeH+2]([ZnH2-2]6)[ZnH-2]35 | Jmol = [SeH+2]12[ZnH2-2][SeH+2]3[ZnH2-2][SeH+2]([ZnH-2]14)[ZnH-2]1[Se+2]5([ZnH-2]38)[Zn-2]26[SeH+2]2[ZnH-2]([Se+2]4)[SeH+2]1[ZnH2-2][SeH+2]3[ZnH-2]2[Se+2][ZnH-2]([SeH+2]6[ZnH-2]([SeH+2])[SeH+2]68)[SeH+2]([ZnH2-2]6)[ZnH-2]35
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'''Stilleite''' is a selenide mineral, zinc selenide, with the formula ZnSe. It has been found only as microscopic gray crystals occurring as inclusions in linnaeite associated with other selenide and sulfides. It was originally discovered in Katanga Province, Zaire in 1956 and is named for the German geologist, Hans Stille (1876–1966).<ref>[http://webmineral.com/data/Stilleite.shtml Webmineral.com – Stilleite]</ref>
It has been reported from the Santa Brigida mine, La Rioja Province, Argentina and from Tilkerode (Abberode) in the Harz Mountains, Germany.<ref name=HBM/> Associated minerals include pyrite, linnaeite, clausthalite, selenian vaesite, molybdenite and dolomite in the Shinkolobwe region of the Congo); and with tiemannite, clausthalite, eucairite, umangite, klockmannite in the Santa Brigida mine, Argentina.<ref name=HBM/>
==See also== *List of minerals *List of minerals named after people
==References== {{reflist}}
Category:Zinc minerals Category:Selenide minerals Category:Cubic minerals Category:Minerals in space group 216 Category:Minerals described in 1956
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