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General Information: Chemical Formula:(Mn,Zn,Fe++)SO4·4(H2O) Composition:(Molecular Weight = 226.29 gm)Manganese 14.57 % MnZinc 8.67 % ZnIron 2.47 % FeHydrogen 3.56 % H Sulfur 14.17 % S Oxygen 56.56 % O  Empirical Formula: Mn2+0.6Zn0.3Fe2+0.1(SO4)·4(H2O)Physical Properties: Color:green, greenish white, or white. Density:2.261 Diaphaniety:Transparent Hardness:2-3 - Gypsum-Calcite Luminescence:Non-fluorescent. Luster:Vitreous (Glassy) Streak:whiteMore details...

(Mn,Zn,Fe)(SO4) 4(H2O)