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Bayldonite

Year of discovery: 1865 (Penberthy Croft mine, UK), 1992 (Japan)

Locality list: 5 localities of bayldonite

• Cu₃Pb(AsO₄)₂(OH)₂
• (Cu,Zn)₃Pb(AsO₄)₂(OH)₂
• [Cu²⁺₃][Pb²⁺][(OH)₂|(AsO₄)₂]^8-

• Class: Arsenate - Hydroxide
• Soluble in: HCl (Difficult)
• Formed by alteration of Mimetite.

• Color: Green
• Streak: Pale green
• Luster: Resinous
• Diaphaneity: Translucent

• Aggregate: Amygdaloidal

• Cleavage: No
• Hardness: 4.5
• Density: 5.5

• System: Monoclinic
• Group: 2/m, A2/a
• Lattice: a=14.1, b=5.9, c=10.1, β=106.5