Abstract
Crystals corresponding to nukundamite were obtained by hydrothermal synthesis in a temperature gradient. The empirical formula of the synthetic mineral analyzed by electron microprobe is Cu3.39Fe0.61S4. Its crystal data are: trigonal, space group P3ml, a = 3.7830(2), c = 11.1950(8)Å; Z = 1. The crystal structure has been determined using counter-measured intensities. The characteristic S–S bond recognized in minerals such as covelline and pyrite is confirmed in the structure, and its bond length in the S2 group is 2.062(20)Å. The metal atoms are in two non-equivalent sites and are tetrahedrally coordinated with sulfur.
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