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Serpierite

Year of discovery: 1881 (Serpieri mine, Greece), 1979 (Japan)

Locality list: 17 localities of serpierite

• Ca(Cu,Zn)₄(SO₄)₂(OH)₆,3H₂O
• [Ca²⁺][(Cu²⁺,Zn²⁺)₄][(OH)₆|(SO₄)₂]^10-,3H₂O

• Class: Sulfate - Hydroxide - Hydrate
• Soluble in: HCl, HNO₃, H₂SO₄

• Polymorph: Orthoserpierite (Orthorhombic)

• Ca => Cd: Aldridgeite

• (Cu,Zn) => Cu: Devilline

• Color: Blue
• Streak: Pale blue
• Luster: Pearly
• Diaphaneity: Transparent

• Habit: Acicular, Platy
• Aggregate: Radial

• Cleavage: Perfect on {001} (1 plane)
• Hardness: 2
• Density: 3.1

• System: Monoclinic
• Group: 2/m, C2/c
• Lattice: a=22.2, b=6.3, c=21.9, β=113.4