General Information:
Chemical Formula:
(Mn,Mg)9Fe+++3(PO4)8(OH)3·9(H2O)
Composition:
(Molecular Weight = 1,565.99 gm)
Magnesium 3.49 % Mg
Manganese 23.68 % Mn
Iron 10.70 % Fe
Phosphorus 15.82 % P
Hydrogen 1.35 % H
Oxygen 44.95 % O
Empirical Formula:
9(Mn2+0.75)9(Mg0.25)Fe2+3(PO4)8(OH)3·9(H2O)
IMA Status:
Approved IMA 1976
Physical Properties:
Cleavage:
[???] Indistinct
Color:
brown.
Density:
3.026
Hardness:
3-3.5 - Calcite-Copper Penny
Luminescence:
Non-fluorescent.
Streak:
light brown
More details...