Iowaite

General Information: Chemical Formula:Mg4Fe+++(OH)8OCl·2-4(H2O) Composition:(Molecular Weight = 394.62 gm)Magnesium 24.64 % MgIron 14.15 % FeHydrogen 3.58 % H Chlorine 8.98 % ClOxygen 48.65 % O  Empirical Formula: Mg4Fe3+(OH)8OCl·3(H2O) IMA Status:Approved IMA 1967Physical Properties: Cleavage:[0001] Perfect Color:bluish green, greenish white, or honey yellow. Density:2.09 - 2.11, Average = 2.09 Diaphaniety:Transparent Hardness:2.5 - Finger Nail Luster:Greasy (Oily) Streak:whiteMore details...

Mg4Fe(OH)8OCl 3(H2O)