General Information:
Chemical Formula:
(Mn+++,Fe+++)2O3
Composition:
(Molecular Weight = 158.33 gm)
Manganese 52.05 % Mn
Iron 17.64 % Fe
Oxygen 30.32 % O
Empirical Formula:
Mn3+1.5Fe3+0.5O3
Environment:
Pneumatolytic, hydrothermal, and metamorphic rocks.
Locality:
Siapa and Chhindwara, India. Thomas Range, Utah.
Name Origin:
Named after the American mineralogist, M. Bixby.
Physical Properties:
Cleavage:
[111] Imperfect
Color:
black.
Density:
4.95
Diaphaniety:
Opaque
Habits:
Crystalline - Fine - Occurs as well-formed fine sized crystals., Massive - Granular - Common texture observed in granite and other igneous rock.,
Hardness:
6-6.5 - Orthoclase-Pyrite
Luminescence:
None.
Luster:
Metallic
Streak:
black
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