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Parnauite

Year of discovery: 1978 (Majuba Hill mine, USA), 1982 (Japan)

Locality list: 5 localities of parnauite

• Cu₉(AsO₄)₂SO₄(OH)₁₀,7H₂O
• [Cu²⁺₉][(OH)₁₀|SO₄|(AsO₄)₂]^18-,7H₂O
• [Cu²⁺₉][(OH)₈|CO₃|SO₄|(AsO₄)₂]^18-,6H₂O ?

• Class: Arsenate - Sulfate - Hydroxide - Hydrate
• Soluble in: HCl (with bubbles)

• Color: Pale blue, Green, Dark green, Yellowish green
• Streak: Pale bluish green
• Luster: Vitreous
• Diaphaneity: Translucent

• Cleavage: Perfect (1 plane)
• Hardness: 2
• Density: 3.1

• System: Orthorhombic
• Group: mmm, P2₁22
• Lattice: a=15.0, b=14.2, c=6.0