Valence state of atoms in the perovskite-like phase SrxCu3V 4O12 (x = 0.67−1.0) and its properties

We report the first synthesis, at high pressure and temperature (p = 6.0-8.0 GPa, t = 1000 deg C), of SrxCu3V4O12 (x = 0.67-1.0), a cation-deficient perovskite-like phase of variable composition (sp. gr. Im {expression} , Z = 2). Using x-ray photoelectron spectroscopy, we have determined the binding...

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Bibliographic Details
Published in:Inorganic materials 2007-06, Vol.43 (6), p.660-665
Main Authors: Volkov, V. L., Kadyrova, N. I., Zakharova, G. S., Kuznetsov, M. V., Podval’naya, N. V., Mikhalev, K. N., Zainulin, Yu. G.
Format: Article
Language:English
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Summary:We report the first synthesis, at high pressure and temperature (p = 6.0-8.0 GPa, t = 1000 deg C), of SrxCu3V4O12 (x = 0.67-1.0), a cation-deficient perovskite-like phase of variable composition (sp. gr. Im {expression} , Z = 2). Using x-ray photoelectron spectroscopy, we have determined the binding energies and valence states of atoms in SrxCu3V4O12. The stoichiometric composition of this phase can be represented by the chemical formula SrCuCu 2 (V 2 V 2 )O12. Air exposure leads to the formation of SrCO3 and Sr(OH)2 on its surface and to the oxidation of univalent copper and tetravalent vanadium. According to IR spectroscopy data, the penta-and tetravalent vanadium in the high-pressure phase is in octahedral oxygen coordination. The electrical conductivity, magnetic susceptibility, thermal properties, and ion selectivity of this compound have been investigated.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168507060192