Zeunerite

General Information:
 Chemical Formula:
Cu(UO2)2(AsO4)2·10-16(H2O)
 Composition:
(Molecular Weight = 1,061.59 gm)
Uranium 44.84 % U 
Copper 5.99 % Cu
Arsenic 14.11 % As
Hydrogen 1.90 % H 
Oxygen 33.16 % O 
 Empirical Formula:
Cu(UO2)2(AsO4)2·10(H2O)
 Name Origin:
Named after the German physicist, G. A. Zeuner (1828-1907).
Physical Properties:
 Cleavage:
[001] Perfect
 Color:
green, green, or emerald green.
 Density:
3.2 - 3.4, Average = 3.3
 Diaphaniety:
Transparent to Translucent
 Habits:
Tabular - Form dimensions are thin in one direction., Scaly - Morphology like fish scales., Micaceous - Platy texture with "flexible" plates.
 Hardness:
2.5 - Finger Nail
 Luminescence:
None.
 Luster:
Vitreous (Glassy)
 Streak:
pale green
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