Georgeericksenite

General Information: Chemical Formula:Na6CaMg(IO3)6(CrO4)2·12(H2O) Composition:(Molecular Weight = 1,699.91 gm)Sodium 8.11 % NaCalcium 2.36 % CaMagnesium 1.43 % MgChromium 6.12 % CrHydrogen 1.42 % H Iodine 44.79 % I Oxygen 35.77 % O  Empirical Formula: Na6CaMg(IO3)6(CrO4)2·12(H2O) Environment:Arid climate and associated with the Chilean nitrate caliche deposits. IMA Status:Approved IMA (Dana # Added) Locality:Oficina Chacabuco, Chile Name Origin:Named after George E. Ericksen (1920-1996) of Reston, Virginia who conducted studies of nitrate deposits for the U.S.G.S.Physical Properties: Cleavage:None Color:pale yellow or bright lemon yellow. Density:3.035 Diaphaniety:Transparent to translucent Habits:Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Acicular - Occurs as needle-like crystals., Hardness:3-4 - Calcite-Fluorite Luminescence:None. Luster:Vitreous (Glassy) Streak:pale yellowMore details...