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Truscottite

Year of discovery: 1914 (Lebong Donok mine, Indonesia), 1962 (Japan)

Locality list: 10 localities of truscottite

• Ca₁₄Si₂₄O₅₈(OH)₈,2H₂O
• (Ca,Mn)₁₄Si₂₄O₅₈(OH)₂,2H₂O
• [][Ca²⁺₁₄][(OH)₈|(Si₁₂O₂₉)₂]^28-,2H₂O

• Class: Phyllosilicate - Hydroxide - Hydrate

• []Si₂ => Na₂Al₂: Reyerite

• Color: Colorless, White
• Streak: White
• Luster: Pearly
• Diaphaneity: Translucent

• Cleavage: Perfect on {0001} (1 plane)
• Hardness: 3.5
• Density: 2.5

• System: Trigonal
• Group: (-3), P(-3)
• Lattice: a=9.7, c=18.8