Вид документа : Статья из журнала Шифр издания : 54/S 98 Автор(ы) : Volkov V. L., Podval'naya N. V., Cherkashenko V. M., Nemnonov S. N. Заглавие : Synthesis, VKβ5'' Spectra, and Magnetic Properties of M4±xV6O16±x • nH2O (M = K, Rb, Cs) Polyvanadates Место публикации : Russian Journal of Inorganic Chemistry. - 2007. - Vol. 52, № 8. - С. 1189-1193: il. Примечания : Bibliogr. : p. 1193 (15 ref.) ISSN: 0036-0236 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): поливанадаты--магнитная восприимчивость Аннотация: Tetragonal polyvanadates M4±xV6O16±x·nH2O (M = K, Rb, Cs) have been synthesized under hydrothermal conditions. According to the VKβ5β''spectra of the hydrates, vanadium atoms have an average valence state (the V5+V4+ charge-fluctuation frequency is higher than 10–15 s). After dehydration, the phases do not change their crystal system. The thermal properties of the compounds have been studied in air and under an inert atmosphere. K4.2V6O16.2 and Rb4,1V6O16.1 melt congruently at 720 and 690°ë, respectively. Cs3.8V6O15.8 melts incongruently at 675°ë. The magnetic susceptibility of all phases obeys the Curie–Weiss law in the range from 77 to 673 K Доп.точки доступа: Volkov, V. L.; Волков Виктор Львович; Podval'naya, N. V.; Cherkashenko, V. M.; Nemnonov, S. N.