General Information:
Chemical Formula:
Fe++Fe+++3As+++5O13
Composition:
(Molecular Weight = 805.99 gm)
Iron 27.72 % Fe
Arsenic 46.48 % As
Oxygen 25.81 % O
Empirical Formula:
Fe2+Fe3+3As5O13
IMA Status:
Approved IMA 1973
Physical Properties:
Color:
brown or black.
Density:
4.3
Diaphaniety:
Opaque
Hardness:
3 - Calcite
Luster:
Sub Metallic
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