General Information:
Chemical Formula:
(Fe++,Mn++)2(PO4)(OH)
Composition:
(Molecular Weight = 223.22 gm)
Manganese 12.31 % Mn
Iron 37.53 % Fe
Phosphorus 13.88 % P
Hydrogen 0.45 % H
Oxygen 35.84 % O
Empirical Formula:
Fe2+1.5Mn2+0.5(PO4)(OH)
Physical Properties:
Cleavage:
[010] Good, [120] Distinct
Color:
greenish, dark brown, or reddish brown.
Density:
3.79
Diaphaniety:
Transparent to Translucent
Hardness:
4.5-5
Luster:
Vitreous - Greasy
Streak:
white
More details...