Вид документа : Статья из журнала Шифр издания : 54/S 98 Автор(ы) : Krasil'nikov V. N., Perelyaeva L. A., Baklanova I. V., Buldakova L. Yu., Yanchenko M. Yu. Заглавие : Synthesis and Properties of M2V8O21 (M=K, Tl) Octavanadates and K2-xTlxV8O21 (0 ≤ x ≤ 2) Solid Solutions Место публикации : Russian Journal of Inorganic Chemistry. - 2009. - Vol. 54, № 10. - С. 1537-1542: il. Примечания : Bibliogr. : p. 1542 (15 ref.) ISSN: 0036-0236 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): октаванадаты--твердые растворы Аннотация: Formation parameters and properties of M2V8O21 octavanadates where M = K and Tl were studied using X-ray powder diffraction, microscopy, thermogravimetry, vibrational spectroscopy, EPR, and voltammetry. Original synthesis processes for these compounds were developed; their thermal stability parameters were determined. Potassium and thallium(I) octavanadates were shown to form complete solid solutions with each other. Potassium octavanadate in air is stable to 450°C; above this temperature, it transforms, on account of partial reduction of vanadium, to vanadium bronze by the reaction K2V8O21-- K2V8O20.8 + 0.1O2. The K2V8O20.8 percentage in the sample increases with rising temperature. The substitution of small thallium amounts for potassium (x ≥ 0.025) enhances the stability of the phase until it melts at ~525°C. Доп.точки доступа: Krasil'nikov, V. N.; Красильников Владимир Николаевич; Perelyaeva, L. A.; Переляева Л. А.; Baklanova, I. V.; Buldakova, L. Yu.; Yanchenko, M. Yu.