Natrophosphate

General Information:
 Chemical Formula:
Na7(PO4)2F·19(H2O)
 Composition:
(Molecular Weight = 712.16 gm)
Sodium 22.60 % Na
Phosphorus 8.70 % P 
Hydrogen 5.38 % H 
Oxygen 60.66 % O 
Fluorine 2.67 % F 
 Empirical Formula:
Na7(PO4)2F·19(H2O)
 IMA Status:
Approved IMA 1972
Physical Properties:
 Cleavage:
[111] Indistinct
 Color:
colorless or white.
 Density:
1.71 - 1.722, Average = 1.71
 Diaphaniety:
Transparent
 Hardness:
2.5 - Finger Nail
 Luminescence:
Fluorescent.
 Luster:
Vitreous - Greasy
 Streak:
white
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