Schulenbergite

General Information: Chemical Formula:(Cu,Zn)7(SO4,CO3)2(OH)10·3(H2O) Composition:(Molecular Weight = 846.73 gm)Zinc 15.45 % ZnCopper 37.52 % CuHydrogen 1.90 % H Carbon 0.71 % C Sulfur 5.68 % S Oxygen 38.74 % O  Empirical Formula: Cu5Zn2(SO4)1.5(CO3)0.5(OH)10·3(H2O) Environment:Found in the mine dumps. Locality:Glucksrad mine, near Oberschulenberg, Harz, Germany. Name Origin:Named for the locality.Physical Properties: Cleavage:[???] Perfect Color:green blue or light green blue. Density:3.28 Diaphaniety:Transparent Habits:Microscopic Crystals - Crystals visible only with microscopes., Rosette - Bundled tabular aggregates resembling rose flower petals., Hardness:2 - Gypsum Luminescence:Non-fluorescent. Luster:Silky Streak:pale blue blueMore details...

(C ,Zn)7(SO4,CO3)2(OH)10 3(H2O)