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Augelite

Year of discovery: 1868 (Västanå mine (Westanå mine), Sweden), 1977 (Japan)

Locality list: A locality of augelite

• Al₂(PO₄)(OH)₃
• [Al³⁺₂][(OH)₃|PO₄]^6-

• Class: Phosphate - Hydroxide
• Soluble in: hot HCl (Slowly)

• Color: White, Colorless
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Cleavage: Perfect on {110} (2 planes), Good on {201} (1 plane), Imperfect on {001} and {101} (2 planes)
• Hardness: 4.5-5
• Density: 2.7

• System: Monoclinic
• Group: 2/m, B2/m
• Lattice: a=13.1, b=8.0, c=5.1, β=112.3

Etymology: Auge (luster) in Greek