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Cerchiaraite-(Mn)

Year of discovery: 2000 (Cerchiara mine, Italy), 2025 (Japan)

Locality list: A locality of cerchiaraite-(Mn)

• Ba₄Mn₄Si₄O₁₂O₂(OH)₄Cl₂[Si₂O₃(OH)₄]
• [Ba²⁺₄][Mn³⁺₄][(OH)₄|Cl₂|O₂|Si₂O₃(OH)₄|Si₄O₁₂]^20-

• Class: Cyclosilicate (Single ring) - Sorosilicate - Oxide - Chloride - Hydroxide

• Color: Dark green
• Streak: Pale green
• Luster: Vitreous
• Diaphaneity: Transparent

• Cleavage: None
• Hardness: 4-5
• Density: 3.6

• System: Tetragonal
• Group: 4/mmm, I4/mmm
• Lattice: a=14.2, c=6.1