Chemical aspect of the structural disorder in CuCrS2 and CuCr1–xVxS2 solid solutions

A gradient chemical structure of micron-sized crystals of CuCrS 2 and CuCr 1– x V x S 2 powders is established by the differential dissolution technique. It is shown that their surface region coherently conjugated with planar faces of CuCrS 2 crystals is enriched with copper whereas the bulk is depl...

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Bibliographic Details
Published in:Journal of structural chemistry 2017-09, Vol.58 (5), p.1009-1017
Main Author: Vasilyeva, I. G.
Format: Article
Language:English
Subjects:
Atomic
Atomic/Molecular Structure and Spectra
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Molecular
Optical and Plasma Physics
Physical Chemistry
Solid State Physics
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Summary:A gradient chemical structure of micron-sized crystals of CuCrS 2 and CuCr 1– x V x S 2 powders is established by the differential dissolution technique. It is shown that their surface region coherently conjugated with planar faces of CuCrS 2 crystals is enriched with copper whereas the bulk is depleted of copper and the copper sublattice is disordered. A possible mechanism of the formation of surface regions due to a high bulk mobility of copper atoms in the defect copper sublattice is proposed. It is shown that for solid solutions the disordering process involves copper and vanadium atoms and vacancy complexes. The phenomena found are discussed together with the structural and magnetic data.
ISSN:0022-4766
1573-8779
DOI:10.1134/S0022476617050225