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Mcguinnessite

Year of discovery: 1981 (Copper King mine, USA), 1993 (Japan)

Locality list: 2 localities of mcguinnessite

• (Mg,Cu)₂CO₃(OH)₂
• [(Mg²⁺,Cu²⁺)₂][(OH)₂|CO₃]^4-

• Class: Rosasite group
• Class: Carbonate - Hydroxide

• (Mg,Cu) => Ni: Nullaginite
• (Mg,Cu) => Cu: Malachite
• (Mg,Cu) => Fe: Chukanovite
• (Mg,Cu) => Mg: Pokrovskite
• (Mg,Cu) => (Cu,Zn): Rosasite
• (Mg,Cu) => (Cu,Ni): Glaukosphaerite
• (Mg,Cu) => (Cu,Co): Kolwezite

• Color: Bluish green, Green
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Hardness: 2.5
• Density: 3.1

• System: Monoclinic
• Group: 2/m, P2/a
• Lattice: a=9.4, b=12.0, c=3.4, β=93.3