Metatorbernite mineral
Metatorbernite mineral. This radioactive mineral is a dehydrated pseudomorph of the copper uranyl phosphate torbernite. The formula is: Cu(UO2)2(PO4)2.8H2O. It commonly occurs as green deposits, including direct deposition from a supersaturated solution, which produces true crystalline metatorbernite (translucent dark green and a vitreous lustre). This specimen, from Musana in Katanga, Zaire, is 25 centimetres across.
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