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Bermanite

Year of discovery: 1936 (7U7 Ranch, USA), 2013 (Japan)

Locality list: A locality of bermanite

• Mn₃(PO₄)₂(OH)₂,4H₂O
• [Mn²⁺][Mn³⁺₂][(OH)₂|(PO₄)₂]^8-,4H₂O

• Class: Arthurite Group
• Class: Phosphate - Hydroxide - Hydrate
• Soluble in: HNO₃
• Lightfastness: Turn black by light exposure.

• Mn³⁺ => Fe: Earlshannonite

• Mn₃ => Fe₃: Whitmoreite
• Mn₃ => CuFe₂: Kunatite

• PO₄ => AsO₄: Coralloite

• Color: Brown
• Streak: Pale brown
• Luster: Resinous
• Diaphaneity: Transparent-Translucent

• Cleavage: Perfect on {001} (1 plane), Imperfect on {110} (1 plane)
• Hardness: 3.5
• Density: 2.8

• System: Monoclinic
• Group: 2/m, P2/b
• Lattice: a=5.4, b=19.2, c=5.4, β=110.3