Die Kristallstruktur von synthetischem Ellisit, Tl3AsS3*
- 1 February 1980
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Kristallographie - Crystalline Materials
- Vol. 151 (3-4) , 249-254
- https://doi.org/10.1524/zkri.1980.151.3-4.249
Abstract
The crystal structure of synthetic ellisite, Tl3AsS3, has been determined bv means of 3d-counter data. The space group is C 5 3v -R3m with a rho = 5.9967(6) Å, α rho = 105.88(1)°, Z = 1 (a hex = 9.5707(5) Å, c hex = 6.9888(4)Å. The structure was solved by a 3d-Pattersonfunction and a full-matrix least-squares refinement with anisotropic temperature factors and anomalous dispersion to an.R-value of 5.8% for the observed reflections. The Tl atom is surrounded by three S atoms in a trigonal-pyramidal arrangement at distances between 3.048 Å and 3.095 Å (mean: 3.063 Å) and by two additional S atoms at a distance of 3.444Å. The As atom shows the usual trigonal-pyramidal coordination by the S atoms (As –S = 2.227 Å). The structure is built up by the threedimensional network of the Tl-polyhedra together with the As-pyramids.Keywords
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