Levyclaudite

General Information: Chemical Formula:Pb8Sn7Cu3(Bi,Sb)3S28 Composition:(Molecular Weight = 4,160.38 gm)Copper 4.58 % CuTin 19.97 % SnBismuth 12.56 % BiAntimony 1.46 % SbLead 39.84 % PbSulfur 21.58 % S  Empirical Formula: Pb8Sn7Cu3Bi2.5Sb0.5S28 IMA Status:Approved IMA Locality:Aghios Philippos Pb-Zn deposit, Kirki district, Greece. Name Origin:Named for Claude Levy (1924-), French mineralogist.Physical Properties: Cleavage:[100] Good Color:gray. Diaphaniety:Opaque Habits:Microscopic Crystals - Crystals visible only with microscopes., Lamellar - Thin laminae producing a lamellar structure., Hardness:2.5-3 - Finger Nail-Calcite Luster:Metallic Streak:blackMore details...

Pb8Sn7C 3(Bi,Sb)3S28