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Tacharanite

Year of discovery: 1961 (Portree, UK), 1977 (Japan)

Locality list: 8 localities of tacharanite

• Ca₁₂Al₂Si₁₈O₅₁,18H₂O
• [Ca²⁺₁₂][Al₂Si₁₈O₅₁]^24-,18H₂O

• Class: Aluminosilicate - Hydroxide (Detailed structure unknown)

• Color: White
• Streak: White
• Luster: Earthy
• Diaphaneity: Translucent

• Habit: Fine grained
• Aggregate: Ceramics

• Hardness: 5
• Density: 2.3

• System: Monoclinic
• Lattice: a=17.1, b=3.7, c=27.9, β=114.1