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Physico-chemical properties of chromium sesquisulphide

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Abstract

The range of stoichiometry and defect structure of chromium sesquisulphide, “Cr2S3”, have been determined for a range of temperature (1123 to 1273 K) and sulphur pressure (1.06×10−1 to 1.77×104 N m−2) employing chemical analysis, marker and thermoelectric power measurement techniques. It has been shown that the upper limit of stoichiometry corresponds to CrS1.54, while the lower limit extends to at least CrS1.30. The conditions (temperature and sulphur pressure) under which the compound is stable at compositions intermediate to these values have been determined for S/Cr ratios at intervals of 0.02.

It has been established that “Cr2S3” is ann-type metal-excess compound within these composition limits, containing unassociated trivalent chromium interstitials and/or trivalent chromium interstitials associated with one quasi-free electron, as the predominant mobile defect species.

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Author notes

  1. A. F. Hampton

    Present address: Aerospace Research Laboratories, Wright-Patterson Air Force Base, Ohio, USA

Authors and Affiliations

  1. Department of Materials Science, Newcastle upon Tyne Polytechnic, Newcastle upon Tyne, UK

    K. N. Strafford & A. F. Hampton

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  1. K. N. Strafford
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  2. A. F. Hampton
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Strafford, K.N., Hampton, A.F. Physico-chemical properties of chromium sesquisulphide. J Mater Sci 8, 1534–1544 (1973). https://doi.org/10.1007/BF00754887

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  • DOI: https://doi.org/10.1007/BF00754887

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