Thermal behaviour of sulphato and nitrato complexes of cerium(IV) |
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| Authors: | G. Pokol T. Leskelä L. Niinistö |
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| Affiliation: | (1) Laboratory of Inorganic and Analytical Chemistry, Helsinki University of Technology, FIN-02150 Espoo, Finland;(2) Present address: Institute for General and Analytical Chemistry, Technical University of Budapest, H-1521 Budapest, Hungary |
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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 and3) the decompositions are accompanied by changes in the oxidation state of cerium; the presence of Ce(III) and Ce(IV) were studied byex situ magnetic susceptibility and XPS measurements. The crystal structure of (1) was determined as well. It forms monoclinic crystals with space groupP21/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. |
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| Keywords: | Ce(IV) compounds magnetic susceptibility thermal analysis XPS |
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