Dittmarite

General Information:
 Chemical Formula:
(NH4)Mg(PO4)·(H2O)
 Composition:
(Molecular Weight = 155.33 gm)
Magnesium 15.65 % Mg
Phosphorus 19.94 % P 
Hydrogen 3.89 % H 
Nitrogen 9.02 % N 
Oxygen 51.50 % O 
 Empirical Formula:
NH4Mg(PO4)·(H2O)
Physical Properties:
 Cleavage:
[???] Perfect
 Color:
colorless.
 Density:
2.19
 Diaphaniety:
Transparent
 Hardness:
5 - Apatite
 Luster:
Vitreous (Glassy)
 Streak:
white
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