Kaatialaite

General Information: Chemical Formula:Fe+++[H2As+++++O4]3·5-5.5(H2O) Composition:(Molecular Weight = 577.74 gm)Iron 9.67 % FeArsenic 38.90 % AsHydrogen 2.97 % H Oxygen 48.46 % O  Empirical Formula: Fe3+3(H2)3(AsO4)·5.5(H2O) Locality:Kaatiala granite pegmatite, Kuortane, western Finland. Name Origin:Named for the locality.Physical Properties: Color:greenish blue, gray, yellow, or white. Density:2.64 Diaphaniety:Transparent Habits:Acicular - Occurs as needle-like crystals., Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape., Streak:whiteMore details...