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Zunyite (Photo)

Year of discovery: 1884 (Zuni mine, USA), 1925 (Japan)

Locality list: 39 localities of zunyite

• Al₁₃Si₅O₂₀(OH)₁₈Cl
• Al₁₃Si₅O₂₀(OH,F)₁₈Cl
• [Al³⁺₁₃][(OH)₁₈|Cl|O₄|Si5O₁₆]^39-

• Class: Sorosilicate - Oxide - Chloride - Hydroxide
• Insoluble in: HCl

• Color: Colorless, Gray
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Habit: Tetrahedral

• Cleavage: Good on {111} (4 planes)
• Hardness: 7
• Density: 2.9

• System: Cubic
• Group: (-4)3m, F(-4)3m
• Lattice: a=13.9

Etymology: Zuni mine in Colorado, USA, where this mineral was discovered for the first time.