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Taranakite

Year of discovery: 1865 (Sugar Loaves islands, New Zealand), 1973 (Japan)

Locality list: 6 localities of taranakite

• KAl₃(PO₄)₃(OH),9H₂O
• (K,NH₄)Al₃(PO₄)₃(OH),9H₂O
• [K⁺][Al³⁺₃][OH|(PO₄)₃]^10-,9H₂O

• Class: Phosphate - Hydroxide - Hydrate
• Soluble in: HCl, HNO₃, H₂SO₄
• Radioactive: Very weak

• Color: Yellow, Gray
• Streak: White
• Luster: Earthy
• Diaphaneity: Transparent

• Hardness: 1-2
• Density: 2.1

• System: Trigonal
• Group: (-3)m, R(-3)c
• Lattice: a=8.7, c=95.1