Вид документа : Статья из журнала Шифр издания : 54/V 18 Автор(ы) : Volkov V. L., Kadyrova N. I., Zakharova G. S., Kuznetsov M. V., Podval'naya N. V., Mikhalev K. N., Zainulin Yu. G. Заглавие : Valence state of atoms in the perovskite-like phase SrxCu3V4O12 (x = 0.67-1.0) and its properties Место публикации : Inorganic Materials. - 2007. - Vol. 43, № 6. - С. 660-665: il. Примечания : Библиогр. : с. 665 (7 назв.) ISSN: 0020-1685 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): перовскитоподобные фазы--фотоэлектронная спектроскопия--ванадий Аннотация: We report the first synthesis, at high pressure and temperature (p= 6.0–8.0 GPa, t= 1000°C), of SrxCu3V4O12(x= 0.67–1.0), a cation-deficient perovskite-like phase of variable composition (sp. gr.Im, 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 Sr2+Cu2+(V2(5+) V2(4+) )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 Держатели документа: Центральная научная библиотека УрО РАН Доп.точки доступа: Volkov, V. L.; Kadyrova, N. I.; Zakharova, G. S.; Kuznetsov, M. V.; Podval'naya, N. V.; Mikhalev, K. N.; Zainulin, Yu. G.