Elsevier

Thermochimica Acta

Volume 13, Issue 2, October 1975, Pages 246-249
Thermochimica Acta

Note
Thermal behaviour of chromium (III) perchlorate hexahydrate

https://doi.org/10.1016/0040-6031(75)80086-4Get rights and content

Abstract

Thermal behaviour of intimate mixtures of chromium(III) oxide and lithium1, potassium2, rubidium3, cesium3 and thallium(I)4 perchlorates revealed that chromium(III) oxide not only catalyses the decomposition by lowering the decomposition temperatures of the pure metal perchlorates but also chemically interacts resulting in the formation of metal dichromate. The oxidation of chromium(III) into the hexavalent state is attributed to the abstraction of oxygen from the perchlorate moiety during the decomposition. In this context, it was thought interesting to study the thermal behaviour of chromium(III) perchlorate and to identify the decomposition products in order to find out whether chromium(III) is oxidized into chromium(VI) by the perchlorate group. Except for a report5 on the preparation of chromium(III) perchlorate with different molecules of water of hydration no work seems to have been carried out on the thermal decomposition of this compound. In the present study, the decomposition characteristics are followed by TG and DTA techniques and the decomposition products have been examined by chemical analysis, X-ray powder diffraction patterns and infrared spectral measurements.

References (10)

  • A. Burcat et al.

    J. Inorg. Nucl. Chem.

    (1968)
  • M.R. Udupa

    Thermochim. Acta

    (1975)
  • M.R. Udupa et al.

    Thermochim. Acta

    (1974)
  • M. R. Udupa, unpublished...
  • V. Biber et al.

    J. Gen. Chem. U.S.S.R.

    (1937)
There are more references available in the full text version of this article.

Cited by (0)

View full text