Sahlinite

General Information: Chemical Formula:Pb14(AsO4)2O9Cl4 Composition:(Molecular Weight = 3,464.44 gm)Arsenic 4.33 % AsLead 83.73 % PbChlorine 4.09 % ClOxygen 7.85 % O  Empirical Formula: Pb14(AsO4)2O9Cl4 Environment:Found in dolomite rock with other Mn oxides. Locality:Langban, Filipstad, Varmland, Sweden. Name Origin:Named for Carl Andreas Sahlin (1861-1943), chemist and manager of the iron works at Laxa, Sweden.Physical Properties: Cleavage:[010] Perfect Color:light yellow or pale sulfur yellow. Density:8 Diaphaniety:Translucent Habits:Thin - Flat dimensioned crystals., Scaly - Morphology like fish scales., Aggregates - Made of numerous individual crystals or clusters. Hardness:2-3 - Gypsum-Calcite Luster:Adamantine Streak:light yellowMore details...