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Gunmaite

Year of discovery: 2022 (Japan as the first occurence in the World)

Locality list:

• (Na₂Sr)Sr₂Al₁₀(PO₄)₄F₁₄(OH)₁₂
• [Na⁺₂Sr²⁺][Sr²⁺₂][Al³⁺₁₀][F₁₄|(OH)₁₂|(PO₄)₄]^38-

• Class: Phosphate - Fluoride - Hydroxide - Hydrate

• Color: Colorless
• Streak: White
• Luster: Resinous, Greasy
• Diaphaneity: Transparent

• Cleavage: Perfect on {001} (1 plane)
• Hardness: 5
• Density: 3.4

• System: Trigonal
• Group: (-3)m, R(-3)m
• Lattice: a=7.0, c=50.3