Z 90 Zuev, M. G. Oxidation State of Vanadium in Eu1 – xYxVTa2O9 Solid Solutions / M. G. Zuev, D. G. Kellerman, V. A. Perelyaev // Inorganic Materials. - 2001. - Vol. 37, № 2. - P186-188 : il. - Bibliogr. : p. 188 (9 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ОКИСЛЕНИЕ -- ВАНАДАТЫ -- МАГНИТНАЯ ВОСПРИИМЧИВОСТЬ -- РАСТВОРЫ ТВЕРДЫЕ Аннотация: The magnetic susceptibility of Eu1- xYxVTa2O9(0 < x< 0.20) solid solutions was found to vary nonmonotonically with Y content. This result was interpreted as due to changes in the proportion of V4+ ions. Increasing the synthesis temperature from 1100 to 1300°C was shown to raise the proportion of V4+ in EuVTa2O9 from 9.87 to 12.03%. The highest light yield was observed at x~0.05, corresponding to the smallest V4+/V5+ ratio Полный текст |