Uranotungstite

General Information:
 Chemical Formula:
(Fe++,Ba,Pb)(UO2)2WO4(OH)4·12(H2O)
 IMA Status:
Approved IMA
 Locality:
Menzenschwand, and Clara mine, Wolfach, Schwarzwald, Baden-Wurttenberg, Germany.
 Name Origin:
Named for the composition.
Physical Properties:
 Cleavage:
[010] Perfect
 Color:
brownish, yellow, yellow brown, or orange.
 Density:
4.27
 Diaphaniety:
Translucent
 Habits:
Microscopic Crystals - Crystals visible only with microscopes., ,
 Hardness:
2 - Gypsum
 Luminescence:
Non-fluorescent.
 Luster:
Earthy (Dull)
 Streak:
yellow
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