Versiliaite

General Information: Chemical Formula:Fe++4Fe+++8Sb+++12O23S2 Composition:(Molecular Weight = 2,563.28 gm)Iron 26.14 % FeAntimony 57.00 % SbSulfur 2.50 % S Oxygen 14.36 % O  Empirical Formula: Fe2+4Fe3+8Sb12O23S2 IMA Status:Approved IMA 1979 Locality:Buca della Vena mine, Versilia valley, Apuan Alps, Italy. Name Origin:Named for the locality.Physical Properties: Cleavage:[110] Perfect Color:black. Density:5.12 Diaphaniety:Opaque Habits:Platy - Sheet forms (e.g. micas)., , Hardness:5 - Apatite Luster:Metallic Streak:blackMore details...