Saddlebackite

General Information: Chemical Formula:Pb2Bi2Te2S3 Composition:(Molecular Weight = 1,183.76 gm)Bismuth 35.31 % BiTellurium 21.56 % TeLead 35.01 % PbSulfur 8.13 % S  Empirical Formula: Pb2Bi2Te2S3 Environment:In a lateritic orebody in a greenstone belt. IMA Status:Approved IMA Locality:Boddington, near Mount Saddleback approximately 100 km SE of Perth, Western Australia. Name Origin:Named after its locality.Physical Properties: Cleavage:[001] Perfect Color:gray or black. Diaphaniety:Opaque Habits:Lamellar - Thin laminae producing a lamellar structure., Aggregates - Made of numerous individual crystals or clusters., Hardness:2-2.5 - Gypsum-Finger Nail Luster:Metallic Streak:blackish grayMore details...