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Strakhovite

Year of discovery: 1994 (Dzhavodi area, Russia, and Zaoblachnyi area, Russia), 1994 (Japan)

Locality list: A locality of strakhovite

• NaBa₃Mn₄Si₆O₁₉(OH)₃
• NaBa₃(Mn²⁺,Mn³⁺)₄Si₆O₁₉(OH)₃
• [Na⁺][Ba²⁺₃][Mn²⁺₂Mn³⁺₂][(OH)₃|Si₂O₇|(SiO₃)₄]^17-

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

• Color: Greenish black
• Streak: Green
• Luster: Vitreous
• Diaphaneity: Translucent

• Hardness: 5-6

• System: Orthorhombic
• Group: mmm, Pnma
• Lattice: a=23.4, b=12.3, c=7.2