Rauvite

General Information:
 Chemical Formula:
Ca(UO2)2V+++++10O28·16(H2O)
 Composition:
(Molecular Weight = 1,825.78 gm)
Calcium 2.20 % Ca
Uranium 26.07 % U 
Vanadium 27.90 % V 
Hydrogen 1.77 % H 
Oxygen 42.06 % O 
 Empirical Formula:
Ca(UO2)2V5+10O28·16(H2O)
Physical Properties:
 Cleavage:
[???] Good
 Color:
bluish black, brown red, orange, or purple red.
 Density:
2.92
 Habits:
Compact - Occurs as a compact mass., ,
 Luminescence:
Non-fluorescent.
 Luster:
Subadamantine
 Streak:
brown
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