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Tinzenite

Year of discovery: 1923 (Parsettens Alp, Switzerland), 1969 (Japan)

Locality list: 11 localities of tinzenite

• Ca₃Al₂BSi₄O₁₅(OH)
• (Ca,Mn,Fe)₃Al₂BSi₄O₁₅(OH)
• [Ca²⁺₂][Ca²⁺][Al³⁺₂][OH|BSi₄O₁₅]^12-

• Class: Axinite group
• Class: Soro-Borosilicate - Hydroxide

• Mn => Ca: Axinite-(Mn) (Series)

• Color: Yellow, Orange
• Streak: White
• Luster: Vitreous
• Diaphaneity: Translucent

• Habit: Thin platy

• Cleavage: Good
• Hardness: 6.5-7
• Density: 3.3

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=9.0, b=9.2, c=7.1, α=102.9, β=98.1, γ=88.0