Chem.
Met. Alloys 1
(2008) 38-42
https://doi.org/10.30970/cma1.0021
J. KOŃCZYK, P. DEMCHENKO,
O. BODAK, G. DEMCHENKO, B. MARCINIAK, W. PROCHWICZ,
L. MURATOVA
The crystal structure of the d-modification of thulium sesquisulfide, d-Tm2S3, has
been determined by X-ray analysis of a single crystal (automatic diffractometer, 1425 unique reflections, R1 = 0.0425,
wR2 = 0.0834). The compound crystallizes in the d-Ho2S3
structure type: space group P21/m, mP30, with lattice
parameters a = 10.0626(14), b = 3.9675(5), c = 17.396(2) Å, b = 98.655(11)°.
The coordination numbers of the Tm atoms are 6 (distorted octahedron) and 7
(mono-capped trigonal prism), whereas the S atoms have coordination numbers 4
and 5 (trigonal and tetragonal pyramids).
Stacking of distorted octahedrons [TmS6] and
mono-capped trigonal prisms [TmS7] in d-Tm2S3.
Keywords
Rare-earth alloys and compounds /