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Aurichalcite (Photo)

Year of discovery: 1839 (Loktevskoye mine, Russia), 1913 (Japan)

Locality list: 35 localities of aurichalcite

• Zn₅(CO₃)₂(OH)₆
• (Zn,Cu)₅(CO₃)₂(OH)₆
• [Zn²⁺₅][(OH)₆|(CO₃)₂]^10-

• Class: Carbonate - Hydroxide
• Soluble in: HCl (with bubbles), HNO₃, H₂SO₄, NH₃aq

• Color: Pale green
• Streak: Pale green-Blue
• Luster: Pearly
• Diaphaneity: Transparent

• Habit: Long prismatic, Foliate
• Aggregate: Reniform

• Cleavage: Perfect on {010} and {100} (2 planes)
• Hardness: 1-2
• Density: 4.0

• System: Monoclinic
• Group: 2/m, P2₁/m
• Lattice: a=13.8, b=6.4, c=5.3, β=101.0