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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