Glaukosphaerite

IMA formula: CuNi(CO₃)(OH)₂

Crystallography: Monoclinic. P2₁/a. a =12.0613(4)Å, b = 9.3653(4) Å, c = 3.1361(1) Å, β = 98.085(5)°. Ζ = 4.