Yanomamite

General Information: Chemical Formula:In(AsO4)·2(H2O) Composition:(Molecular Weight = 289.77 gm)Indium 39.62 % InArsenic 25.86 % AsHydrogen 1.39 % H Oxygen 33.13 % O  Empirical Formula: In(AsO4)·2(H2O) IMA Status:Approved IMA Locality:Mangabeiras granite, Goias state, Brazil. Name Origin:The name is after "Yanomami", a northern-Brazil indian tribePhysical Properties: Cleavage:[???] Indistinct Color:blue green, light green, or light yellow green. Density:3.87 Diaphaniety:Transparent Hardness:5.5-6 - Knife Blade-Orthoclase Luster:Vitreous (Glassy) Streak:whiteMore details...