Crystallographic study of similar sulfo-antimony compounds of Co and Ni

Abstract

Artificial ullmannite NiSbS. A compound corresponding in chemical composition to the mineral ullmannite was obtained by Prof. N. S. Kurnakov and stud. Ya. Posternak (at the St. Petersburg Polytechnic Institute) and was transferred to the Mineralogical Institute of the Mining Institute for crystallographic study. The compound CoSbS. This compound, obtained (also like NiSbS) by student Ya. Posternak, was given to me by Prof. N. S. Kurnakov. The cavity walls in the alloy were dottded with finely tabular crystals, arranged without any regularity, having a strong metallic luster and a steel-gray color.

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