Namuwite

General Information: Chemical Formula:(Zn,Cu)4(SO4)(OH)6·4(H2O) Composition:(Molecular Weight = 528.04 gm)Zinc 24.77 % ZnCopper 24.07 % CuHydrogen 2.67 % H Sulfur 6.07 % S Oxygen 42.42 % O  Empirical Formula: Zn2Cu2(SO4)(OH)6·4(H2O) Environment:Encrusting hydrozincite. IMA Status:Approved IMA 1981 Locality:Averllyn lead mine, Llanrwst mining district, northern Wales. Name Origin:Named for the country of origin, and the National Museum of Wales.Physical Properties: Cleavage:[0001] Perfect Color:light green or pale sea green. Density:2.77 Habits:Encrustations - Forms crust-like aggregates on matrix., Hexagonal - Six-sided crystal shape in cross-section or habit., Platy - Sheet forms (e.g. micas). Hardness:2 - Gypsum Luster:Pearly Streak:pale greenMore details...