Kahlerite

General Information:
 Chemical Formula:
Fe++(UO2)2(AsO4)2·10-12(H2O)
 Composition:
(Molecular Weight = 1,071.91 gm)
Uranium 44.41 % U 
Iron 5.21 % Fe
Arsenic 13.98 % As
Hydrogen 2.07 % H 
Oxygen 34.33 % O 
 Empirical Formula:
Fe2+(UO2)2(AsO4)2·11(H2O)
Physical Properties:
 Cleavage:
[001] Perfect
 Color:
yellow green or lemon.
 Diaphaniety:
Transparent to Translucent
 Hardness:
2-2.5 - Gypsum-Finger Nail
 Luster:
Vitreous (Glassy)
 Streak:
light yellow
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