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Leucophoenicite

Year of discovery: 1899 (Franklin mine, USA), 2007 (Japan)

Locality list: 4 localities of leucophoenicite

• Mn₇(SiO₄)₃(OH)₂
• [Mn²⁺₇][(OH)₂|(SiO₄)₃]^14-

• Class: Humite group
• Class: Nesosilicate - Hydroxide

• Polymorph: Manganhumite (Orthorhombic)

• Mn => Ca: Chegemite

• Color: Brown, Pink
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Indistinct on {001} (1 plane)
• Hardness: 5.5-6
• Density: 3.8

• System: Monoclinic
• Group: 2/m, P2₁/a
• Lattice: a=10.8, b=4.8, c=11.3, β=103.9