Pararobertsite

General Information:
 Chemical Formula:
Ca2Mn+++3(PO4)3O2·3(H2O)
 Composition:
(Molecular Weight = 615.93 gm)
Calcium 13.01 % Ca
Manganese 26.76 % Mn
Phosphorus 15.09 % P 
Hydrogen 0.98 % H 
Oxygen 44.16 % O 
 Empirical Formula:
Ca2Mn3+3(PO4)3O2·3(H2O)
 IMA Status:
Approved IMA
Physical Properties:
 Cleavage:
[100] Perfect
 Color:
bronze, yellow, or dark red.
 Density:
3.22
 Diaphaniety:
Transparent
 Hardness:
2 - Gypsum
 Luster:
Vitreous (Glassy)
 Streak:
brown red
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