Zdenekite

General Information: Chemical Formula:NaPbCu++5(AsO4)4Cl·5(H2O) Composition:(Molecular Weight = 1,229.13 gm)Sodium 1.87 % NaCopper 25.85 % CuArsenic 24.38 % AsHydrogen 0.82 % H Lead 16.86 % PbChlorine 2.88 % ClOxygen 27.34 % O  Empirical Formula: NaPbCu5(AsO4)4Cl·5(H2O) Environment:In a tennantite-bearing horizon near the contact with a lead-bearing horizon in pillars 78, 78b, and 80 in the northern part of the mine. IMA Status:Approved IMA Locality:The Cap Garonne mine, near Le Pradet, 12 km east of Toulon, Var, France. Name Origin:For Dr. Johan Zdenek (1935-), mineralogist and Director of Scientific Affairs of the Bureau de Recherches Geologiques et Minieres, France.Physical Properties: Cleavage:[001] Perfect Color:blue or turquoise. Density:4.1 Diaphaniety:Translucent Habits:Tabular - Form dimensions are thin in one direction., Crystalline - Fine - Occurs as well-formed fine sized crystals., Hardness:1.5-2 - Talc-Gypsum Luminescence:Non-fluorescent. Luster:Vitreous (Glassy) Streak:pale blueMore details...