Arsenbrackebuschite

General Information: Chemical Formula:Pb2(Fe++,Zn)(AsO4)2·(H2O) Composition:(Molecular Weight = 768.49 gm)Zinc 2.13 % ZnIron 5.45 % FeArsenic 19.50 % AsHydrogen 0.26 % H Lead 53.92 % PbOxygen 18.74 % O  Empirical Formula: Pb2Fe2+0.75Zn0.25(AsO4)2·(H2O) IMA Status:Approved IMA 1977Physical Properties: Cleavage:[010] Perfect Color:honey yellow. Density:6.54 Diaphaniety:Transparent to Translucent Hardness:4.5 - Between Fluorite and Apatite Luster:Adamantine - Resinous Streak:brownish yellowMore details...

Pb2(Fe,Zn)(AsO4)2 (H2O)