Haapalaite

General Information: Chemical Formula:2(Fe,Ni)S·1.6(Mg,Fe++)(OH)2 Composition:(Molecular Weight = 276.87 gm)Magnesium 12.29 % MgIron 34.29 % FeNickel 10.60 % NiHydrogen 1.16 % H Sulfur 23.16 % S Oxygen 18.49 % O  Empirical Formula: Fe2+1.5Ni0.5S2Mg1.4Fe2+0.21.6(OH)2 IMA Status:Approved IMA 1973 Locality:Kokka serpentinite, near Outokumpu, Finland. Name Origin:Named for Paavo Haapala (1906-), Finnish geologist.Physical Properties: Cleavage:[???] Good Color:bronze red. Density:3.576 Diaphaniety:Opaque Habits:Thin - Flat dimensioned crystals., Scaly - Morphology like fish scales., Hardness:1 - Talc Luster:MetallicMore details...

4(Fe,Ni)S 3[(Mg,Fe)(OH)2]