{{Short description|Cadmium selenide mineral}} {{Infobox mineral | name = Cadmoselite | boxwidth = | boxbgcolor = | image = Cadmoselite.jpg | imagesize = | alt = | caption = Cadmoselite from the type locality: Ust' Uyok Deposit, Turan District, Tuva Republic, Russian Federation | struct image = | struct caption = | struct imagesize = | struct2 image = | struct2 caption = | struct2 imagesize= | SMILES = | Jmol = | category = | formula = CdSe | IMAsymbol = Cds | molweight = 191.37 | strunz = | dana = | system = | class = | symmetry = | unit cell = | color = Black to pale grey | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | toughness = | mohs = | luster = Adamantine – Resinous | streak = Black | diaphaneity = Translucent to Opaque | gravity = 5.47 | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | Curie temp = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = | var1 = | var1text = | var2 = | var2text = | var3 = | var3text = | var4 = | var4text = | var5 = | var5text = | var6 = | var6text = }} '''Cadmoselite''' is a rare cadmium selenide mineral with chemical formula CdSe. Cadmoselite crystallizes in the hexagonal system and occurs as black to pale grey opaque crystals and grains.<ref name=Handbook>http://rruff.geo.arizona.edu/doclib/hom/cadmoselite.pdf Handbook of Mineralogy</ref><ref name=Webmin>http://webmineral.com/data/Cadmoselite.shtml Webmineral data</ref>
It was first described in 1957 for an occurrence in Tuva. The mineral occurs as interstitial grains in sandstone formed under reducing alkaline diagenetic conditions.<ref name=Handbook/><ref name=Webmin/>
==References== {{Reflist}} *Emsley, John. ''Nature's Building Blocks.'' Oxford, 2001. {{ISBN|0-19-850341-5}}
Category:Cadmium minerals Category:Selenide minerals Category:Hexagonal minerals Category:Minerals in space group 186
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