General Information:
Chemical Formula:
Fe++2ZnMnFe+++(PO4)3(OH)2·9(H2O)
Composition:
(Molecular Weight = 768.94 gm)
Manganese 7.14 % Mn
Zinc 8.50 % Zn
Iron 21.79 % Fe
Phosphorus 12.08 % P
Hydrogen 2.62 % H
Oxygen 47.86 % O
Empirical Formula:
Fe2+2ZnMn2+Fe3+(PO4)3(OH)2·9(H2O)
IMA Status:
Approved IMA 1977
Physical Properties:
Cleavage:
[010] Perfect, [001] Good
Color:
bronze, brown, yellow brown, or light yellow brown.
Density:
2.87 - 2.92, Average = 2.89
Hardness:
4 - Fluorite
Streak:
light brown
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