Parabutlerite

General Information: Chemical Formula:Fe+++(SO4)(OH)·2(H2O) Composition:(Molecular Weight = 204.95 gm)Iron 27.25 % FeHydrogen 2.46 % H Sulfur 15.65 % S Oxygen 54.65 % O  Empirical Formula: Fe3+(SO4)(OH)·2(H2O)Physical Properties: Cleavage:[110] Indistinct Color:light brown orange, light orange, or orange brown. Density:2.55 Diaphaniety:Transparent Hardness:2.5 - Finger Nail Luster:Vitreous (Glassy) Streak:light yellowMore details...