Oenite

General Information: Chemical Formula:CoSbAs Composition:(Molecular Weight = 255.60 gm)Cobalt 23.06 % CoAntimony 47.63 % SbArsenic 29.31 % As Empirical Formula: CoSbAs Environment:In Cu-Co-sulfide skarns. Microscopic crystals in chalcopyrite grains. May be a member of the lollingite group and the arsenic-dominat analogue of costibite. IMA Status:Approved IMA (Dana # Added) Locality:On dumps from an abandoned mine in the Tunaberg deposit, in the southeastern part of Bergslagen, about 100 km southwest of Stockholm, Sweden. Name Origin:For Prof. Dr. Ing Soen Oen (1928-1996), Professor of Petrology, Mineralogy and Ore Geology at the University of Amsterdam.Physical Properties: Color:silver white. Density:7.92 Diaphaniety:Opaque Habits:Anhedral Grains - Granular minerals without the expression of crystal shapes, Microscopic Crystals - Crystals visible only with microscopes., Hardness:5-5.5 - Apatite-Knife Blade Luster:Metallic Streak:grayMore details...