Vladimirite

General Information:
 Chemical Formula:
Ca5(AsO3OH)2(AsO4)2·5(H2O)
 Composition:
(Molecular Weight = 848.16 gm)
Calcium 23.63 % Ca
Arsenic 35.33 % As
Hydrogen 1.43 % H 
Oxygen 39.61 % O 
 Empirical Formula:
Ca5(AsO3OH)2(AsO4)2·5(H2O)
 IMA Status:
Approved IMA 1964
Physical Properties:
 Cleavage:
[???] Good
 Color:
colorless, white, or light pink.
 Density:
3.14
 Diaphaniety:
Transparent
 Hardness:
3.5 - Copper Penny
 Luster:
Vitreous (Glassy)
 Streak:
white
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