Sartorite

General Information: Chemical Formula:PbAs2S4 Composition:(Molecular Weight = 485.31 gm)Arsenic 30.88 % AsLead 42.69 % PbSulfur 26.43 % S  Empirical Formula: PbAs2S4 Locality:Binnental, Valais, Switzerland.Physical Properties: Cleavage:[100] Good Color:dear lead gray. Density:5.4 Diaphaniety:Opaque Habits:Striated - Parallel lines on crystal surface or cleavage face., Acicular - Occurs as needle-like crystals., Hardness:3 - Calcite Luster:Metallic Streak:dark brownMore details...