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Anthoinite

Year of discovery: 1947 (Mt Misobo mine, Congo (Zaïre)), 2011 (Japan)

Locality list: A locality of anthoinite

• AlWO₃(OH)₃
• [Al³⁺₂][(OH)₆|W₂O₆]^6-

• Class: Tungstate (Octahedron framework) - Hydroxide
• Soluble in: HCl (Slowly), HNO₃ (Slowly), hot KOH
• Substitution pseudomorph: Replace Scheelite.

• [] => 2H₂O: Mpororoite

• Color: White
• Streak: White
• Luster: Earthy
• Diaphaneity: Translucent

• Cleavage: Perfect (1 plane)
• Hardness: 1
• Density: 4.8

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=8.2, b=9.2, c=11.3, α=92.8, β=94.1, γ=90.2