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Chalcoalumite (Photo)

Year of discovery: 1925 (Copper Queen mine (Halero mine), USA), 1981 (Japan)

Locality list: 5 localities of chalcoalumite

• CuAl₄(SO₄)(OH)₁₂,3H₂O
• [Cu²⁺][Al³⁺₄][(OH)₁₂|SO₄]^14-,3H₂O

• Class: Sulfate - Hydroxide - Hydrate
• Soluble in: HCl, HNO₃, H₂SO₄
• Alter to Gibbsite.

• Cu => Zn: Kirgyzstanite

• Color: Pale blue, Bluish green
• Streak: White
• Luster: Vitreous
• Diaphaneity: Translucent-Transparent

• Cleavage: Perfect on {100} (1 planes)
• Hardness: 2.5
• Density: 2.3

• System: Monoclinic
• Group: 2, P2₁
• Lattice: a=17.1, b=8.9, c=10.2, β=95.9