Formula: (Mn,Fe)2O3
Origin of name: For M. Bixby, American
Crystal system: Cubic
Crystal class: 2/m -3
Twinning: On {111}, penetration
Unit cell: a = 9.411 Ǻ
Colour: Black
Diaphaneity:
Luster: Brilliant metallic to submetallic
Hardness: 6 to 6.5
Specific gravity: 4.945
Cleavage: 1; {111} in traces
Streak: Black
Synonyms/varieties: Patridgeite (Fe-poor variety)
Comments:
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