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
More details...