Thermal behaviour of sulphato and nitrato complexes of cerium(IV)

G. Pokol, T. Leskelä, L. Niinistö

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Abstract

Four sulphato and nitrato complexes of cerium(IV), viz. (NH4)4Ce(SO4)4·2H2O (1), (NH4)2Ce(SO4)3 (2), (NH4)2Ce(NO3)6 (3) and Cs2Ce(NO3)6 (4) were studied by simultaneous TG/DTA under various experimental conditions in order to establish their decomposition mechanism and to compare the results with the literature data which have been reviewed. In the case of the ammonium compounds (1, 2 and 3) the decompositions are accompanied by changes in the oxidation state of cerium; the presence of Ce(III) and Ce(IV) were studied by ex situ magnetic susceptibility and XPS measurements. The crystal structure of (1) was determined as well. It forms monoclinic crystals with space group P21/c; the parameters of the unit cell are:a=12.638(18) Å, b=11.362(10) Å, c=13.607(11) Å, β=110.17(9)°, V=1834.05 Å3.

Original languageEnglish
Pages (from-to)343-359
Number of pages17
JournalJournal of thermal analysis
Volume42
Issue number2-3
DOIs
Publication statusPublished - Aug 1 1994

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Keywords

  • Ce(IV) compounds
  • XPS
  • magnetic susceptibility
  • thermal analysis

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Engineering(all)

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