Hodrushite—A New Sulphosalt

M. Koděra, V. Kupčik and E. Makovický
Department of Mineralogy and Crystallography, Comenius University, Bratislava, Czechoslovakia
Institut für Mineralogie und Kristallographie, Universität Göttingen, Germany
McGill University, Montreal, Canada

Summary: Hodrushite, a new sulphosalt of copper and bismuth, was found in the Rosalia ore vein at Banská Hodruá near Banská Štiavnica, Czechoslovakia. It has chemical composition Cu8·12Bi11·54Fe0·29S22(as determined by electron-microprobe method) close to Cu8Bi12S22. Symmetry is monoclinic, space group A2/m, lattice constants a 27·21, b 3·93, c 17·58 Å, β 92° 9′, measured density 6·35, calculated density 6·45 g/cm3. Microhardness 200 kg/mm2, anisotropic, weak bireflectance, creamy with pinkish tint, maximum reflectivity about 6000 Å. Crystals needle-shaped and striated along [010], colour steel-grey, quickly tarnishing to bronze. Associated with quartz, hematite, and chalcopyrite. Closely related to cuprobismutite.

Mineralogical Magazine; June 1970 v. 37; no. 290; p. 641-648; DOI: 10.1180/minmag.1970.037.290.02
© 1970, The Mineralogical Society
Mineralogical Society (www.minersoc.org)