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Citation: Zhao Liangzhong. XPS STUDIES OF MIXED VALENCE IN CERIC SULFATE AND ITSTEMPERATURE DEPENDENCE[J]. Acta Physico-Chimica Sinica, ;1988, 4(01): 71-73. doi: 10.3866/PKU.WHXB19880113 shu

XPS STUDIES OF MIXED VALENCE IN CERIC SULFATE AND ITSTEMPERATURE DEPENDENCE

Zhao Liangzhong

1.
Institute of Chemistry; Academia Sinica

Received Date: 27 July 1986
Available Online: 15 February 1988

XPS studies show that ceric sulfate seems to be a mixed valent compound. The ground state is considered as a mixture of two configurations, i.e. 4f~0 and 4f~1. The products of thermal decomposition of ceric sulfate and hence the valence of cerium are related to temperature. For example, after heating Ce(SO_4)_2·4H_2O at temperature between 250 ℃ and 700 ℃ for 2 hours, cerous sulfate (or probably also cerous oxysulfates) were formed. After heating at 800 ℃ for 2 hours, Ce(SO_4)_2·4H_2O was ultimately decomposed into CeO_2.
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