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Wiserite (Photo)

Year of discovery: 1845 (Gonzen mine, Switzerland), 1967 (Japan)

Locality list: 20 localities of wiserite

• Mn₁₄SiO₄(B₂O₅)₄(OH)₈Cl
• Mn₁₄(Si,Mg)(O,OH)₄(B₂O₅)₄(OH)₈Cl
• [Mn²⁺₁₄][Cl|(OH)₈|SiO₄|(B₂O₅)₄]^28-

• Class: Nesosilicate - Soro-Borate - Chloride - Hydroxide

• Color: Pale yellow, Reddish brown
• Streak: White
• Luster: Silky
• Diaphaneity: Transparent

• Cleavage: No
• Hardness: 2.5
• Density: 3.5

• System: Tetragonal
• Group: 4/m, P4/n
• Lattice: a=20.2, c=2.8