Magnesiocopiapite

General Information: Chemical Formula:MgFe+++4(SO4)6(OH)2·20(H2O) Composition:(Molecular Weight = 1,218.39 gm)Magnesium 1.99 % MgIron 18.33 % FeHydrogen 3.47 % H Sulfur 15.79 % S Oxygen 60.41 % O  Empirical Formula: MgFe3+4(SO4)6(OH)2·20(H2O)Physical Properties: Cleavage:[010] Perfect, [101] Indistinct Color:green yellow, yellow, yellow green, or orange. Density:2.08 - 2.17, Average = 2.12 Diaphaniety:Transparent to Translucent Hardness:2.5-3 - Finger Nail-Calcite Luster:Pearly Streak:light yellowMore details...