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Bixbyite [abbr. Bxb ]

Year of discovery: 1897 (Maynard's claim (Pismire Knolls), USA), 1953 (Japan)

Locality list: 3 localities of bixbyite

• γ-Mn₂O₃
• (Mn³⁺,Fe³⁺)₂O₃
• [Mn³⁺₂][O₃]^6-

• Class: Oxide
• Formed by alteration of Pyrochroite.

• Mn => Fe: Hematite (α), Maghemite (γ)
• Mn => Al: Corundum (α)
• Mn => Cr: Eskolaite
• Mn => V: Karelianite
• Mn => Ti: Tistarite
• Mn => As: Arsenolite, Claudetite
• Mn => Sb: Sénarmontite (Senarmontite), Valentinite
• Mn => Bi: Bismite, Sphaerobismoite

• Color: Black
• Streak: Black
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Cubic
• Twin: Common

• Cleavage: Imperfect on {111} (4 planes)
• Hardness: 6-6.5
• Density: 5.0

• System: Cubic
• Group: m3, Ia3
• Lattice: a=9.4

Etymology: M. Bixby, American mineralogist