Czechoslovakia

SUMMARY. Hodrushite, a new sulphosalt of copper and bismuth, was found in the Rosalia ore vein at Bansk~i Hodruga near Bansk~t ~tiavnica, Czechoslovakia. It has chemical composition Cus.:2Bin.5~Fe0.~gS2~(as determined by electron-microprobe m thod) close to CusBi:~S~2. Symmetry is monoclinic, space group A2/m, lattice constants a 27-2x, b 3"93, c i7.5 8 ~, 13 92 ~ 9", measured density 6"35, calculated ensity 6"45 g/cm ~. Microhardness zoo kg/mmL anisotropic, weak bireflectance, creamy with pinkish tint, maximum reflectivity about 6ooo/~. Crystals needle-shaped and striated along [oio], coIour steel-grey, quickly tarnishing to bronze. Associated with quartz, hematite, and chalcopyrite. Closely related to cuprobismutite. THIS paper describes a new sulphosalt of copper and bismuth found in ore veins in Bansk~i Hodruga, Czechoslovakia. The metallogenetic region of Bansk~i-~tiavnica-Bansk~t-Hodruga is situated in the southern part of the neovolcanic Kremnica-~tiavnica Ore Mountains representing a part of the Carpathians. Its polymetallic ore deposits of subvolcanic type consist of a vein system developed mostly in propylitized pyroxenic andesites. The Rosalia vein where the new sutphosalt was found is situated on the west borde