Ushkovite

General Information: Chemical Formula:MgFe+++2(PO4)2(OH)2·8(H2O) Composition:(Molecular Weight = 504.08 gm)Magnesium 4.82 % MgIron 22.16 % FePhosphorus 12.29 % P Hydrogen 3.60 % H Oxygen 57.13 % O  Empirical Formula: MgFe3+2(PO4)2(OH)2·8(H2O) IMA Status:Approved IMAPhysical Properties: Cleavage:[010] Perfect Color:brown, light yellow, or orange. Density:2.38 Diaphaniety:Transparent Hardness:3.5 - Copper Penny Luster:Vitreous - Pearly Streak:whiteMore details...