Barbosalite

General Information:
 Chemical Formula:
Fe++Fe+++2(PO4)2(OH)2
 Composition:
(Molecular Weight = 391.50 gm)
Iron 42.79 % Fe
Phosphorus 15.82 % P 
Hydrogen 0.51 % H 
Oxygen 40.87 % O 
 Empirical Formula:
Fe2+Fe3+2(PO4)2(OH)2
Physical Properties:
 Cleavage:
None
 Color:
blue green, green blue, greenish black, or black.
 Density:
3.6
 Diaphaniety:
Translucent to Opaque
 Hardness:
5.5-6 - Knife Blade-Orthoclase
 Luster:
Vitreous - Dull
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