I-76 Ion State of Atoms and the Properties of Perovskite-Like Compound CaCu3V4O12 / V. L. Volkov, N. I. Kadyrova, G. S. Zakharova, M. V. Kuznetsov, N. V. Podval'naya, K. N. Mikhalev, Yu. G. Zainulin // Russian Journal of Inorganic Chemistry. - 2007. - Vol. 52, № 3. - P329-333 : il. - Bibliogr. : p. 333 (16 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ПЕРОВСКИТОПОДОБНЫЕ СОЕДИНЕНИЯ -- СТЕХИОМЕТРИЯ Аннотация: The binding energies and valence state of atoms in the perovskite-like compound CaCu3V4O12 have been determined using XPS spectroscopy. The stoichiometry of this phase is formulated as Ca2+Cu2+(V2(5+)V2(4+)O12). Under an air atmosphere, the phase interacts with water vapor and oxygen. As a result, Ca(OH)2 is formed on its surface, the Cu+ and V4+ ion concentrations decrease, and the Cu2+ and V5+ concentrations increase in association. Raman spectra show shortened cation–anion bond lengths and cation–anion–cation bond angles in CaCu3V4O12 compared to perovskite CuVO3; the two structures are alike. The electrical conductivity, magnetic susceptibility, thermal and sensor properties of CaCu3V4O12 in aqueous salt solutions have been studied Полный текст |