Bahianite

General Information: Chemical Formula:Al5Sb+++++3O14(OH)2 Composition:(Molecular Weight = 758.16 gm)Aluminum 17.79 % AlAntimony 48.18 % SbHydrogen 0.27 % H Oxygen 33.76 % O  Empirical Formula: Al5Sb3O14(OH)2 IMA Status:Approved IMA 1974Physical Properties: Cleavage:[100] Perfect Color:colorless, violet, cream white, or light brown. Density:4.89 - 5.46, Average = 5.17 Diaphaniety:Transparent Hardness:9 - Corundum Luster:Adamantine Streak:whiteMore details...