cadmoselite

{{Short description|Cadmium selenide mineral}}

{{Infobox mineral

| name = Cadmoselite

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| image = Cadmoselite.jpg

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| caption = Cadmoselite from the type locality: Ust' Uyok Deposit, Turan District, Tuva Republic, Russian Federation

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| formula = CdSe

| IMAsymbol = Cds

| molweight = 191.37

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| color = Black to pale grey

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| luster = Adamantine – Resinous

| streak = Black

| diaphaneity = Translucent to Opaque

| gravity = 5.47

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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.http://rruff.geo.arizona.edu/doclib/hom/cadmoselite.pdf Handbook of Mineralogyhttp://webmineral.com/data/Cadmoselite.shtml Webmineral data

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.