Lepersonnite-(Gd)

General Information: Chemical Formula:CaGd2(UO2)24(CO3)8(SiO4)4·48(H2O) Composition:(Molecular Weight = 8,548.38 gm)Calcium 0.47 % CaGadolinium 3.68 % GdUranium 66.83 % U Silicon 1.31 % SiHydrogen 1.13 % H Carbon 1.12 % C Oxygen 25.45 % O  Empirical Formula: CaGd2(UO2)24(CO3)8(SiO4)4·48(H2O) Environment:In a black crust in the lower portion of the oxidation zone. IMA Status:Approved IMA 1981 Locality:Shinkolobwe, Shaba, Zaire. Name Origin:Named after Jacques Lepersonne (1909-), honorary head of the Department of Geology and Mineralogy, Musee Royale de l'Afrique Centrale, Brussels, Belgium.Physical Properties: Cleavage:[1] Good Color:bright yellow. Density:3.97 Diaphaniety:Transparent to Translucent Habits:Encrustations - Forms crust-like aggregates on matrix., Spherical - Spherical, rounded aggregates., Aggregates - Made of numerous individual crystals or clusters. Luminescence:Non-fluorescent. Luster:Vitreous (Glassy) Streak:light yellowMore details...