General Information:
Chemical Formula:
CaFe++Fe+++(PO4)2(OH)
Composition:
(Molecular Weight = 358.72 gm)
Calcium 11.17 % Ca
Iron 31.14 % Fe
Phosphorus 17.27 % P
Hydrogen 0.28 % H
Oxygen 40.14 % O
Empirical Formula:
CaFe2+Fe3+(PO4)2(OH)
IMA Status:
Approved IMA 1973
Physical Properties:
Cleavage:
[110] Perfect, [010] Indistinct
Color:
dark green or black.
Density:
3.65
Hardness:
5 - Apatite
Luster:
Adamantine - Greasy
Streak:
greenish
More details...