Lesukite

General Information: Chemical Formula:Al2(OH)5Cl·2(H2O) Composition:(Molecular Weight = 210.48 gm)Aluminum 25.64 % AlHydrogen 4.31 % H Chlorine 16.84 % ClOxygen 53.21 % O  Empirical Formula: Al2(OH)5Cl·2(H2O) Environment:The result of interaction of fumarle gases and volcanic rocks at 50 deg C. IMA Status:Approved IMA (Dana # Added) Locality:The Tolbachik Main Fracture eruption, Kamchatka, Russia. Name Origin:Named after Grigorii Ivanovich Lesuke (1935-1995), technical worker in the Department of Crystallography, University of St. Petersburg, Russia.Physical Properties: Color:yellowish orange or yellowish brown. Density:1.87 Diaphaniety:Transparent Habits:Aggregates - Made of numerous individual crystals or clusters., Tabular - Form dimensions are thin in one direction., Luster:Vitreous (Glassy) Streak:yellowish orangeMore details...