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Cacoxenite

Year of discovery: 1825 (Hrbek mine, Czech), 1947 (Japan)

Locality list: 15 localities of cacoxenite

• Fe₂₄AlO₆(PO₄)₁₇(OH)₁₂,75H₂O
• [Fe³⁺₂₄][Al³⁺][(OH)₁₂|O₆|(PO₄)₁₇]^75-,75H₂O

• Class: Phosphate - Oxide - Hydroxide - Hydrate
• Soluble in: HCl, HNO₃, H₂SO₄

• Color: Yellow-Brown
• Streak: Pale Yellow
• Luster: Silky
• Diaphaneity: Translucent

• Habit: Acicular
• Aggregate: Globular

• Cleavage: No
• Hardness: 3-4
• Density: 2.2

• System: Hexagonal
• Group: 6/m, P6₃/m
• Lattice: a=27.6, c=10.7

Etymology: Kakoxenios (blunt) in Greek