Vrbaite

General Information: Chemical Formula:Tl4Hg3Sb2As8S20 Composition:(Molecular Weight = 2,903.50 gm)Thallium 28.16 % TlMercury 20.73 % HgAntimony 8.39 % SbArsenic 20.64 % AsSulfur 22.09 % S  Empirical Formula: Tl4Hg3Sb2As8S20 Environment:Itergrwon with realgar and orpiment. Locality:Allchar, near Rozsdan, northwest of Salonika, Macedonia, Greece.Physical Properties: Cleavage:[010] Good Color:gray black or dark red. Density:5.3 - 2.3, Average = 3.8 Diaphaniety:Opaque to subtranslucent Hardness:3.5 - Copper Penny Luster:Metallic Streak:light redMore details...