L 36 Lattice dynamics in LaTa2-2xNb2xVO9-delta (x = 0-0.1) solid solutions / M. G. Zuev, L. A. Perelyaeva, E. V. Arkhipova, V. S. Kiiko // Journal of Structural Chemistry. - 2003. - Vol. 44, № 2. - P206-210 : il. - Bibliogr. : p. 210 (9 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ТВЕРДЫЕ РАСТВОРЫ -- КИСЛОРОДНАЯ НЕСТЕХИОМЕТРИЯ -- СПЕКТРОСКОПИЯ Аннотация: The oxygen nonstoichiometry delta(x) of LaTa2-2xNb2xVO9-delta (x = 0{0.1) solid solutions was studied using X-ray phase analysis, vibrational spectroscopy, and radiospectroscopy. A correlation was found between delta(x) and the unit cell volume V (x) of the solid solutions. It was shown that the infrared spectra of LaTa2VO9 change in passing from delta = 0 to delta/= 0. The structural position of the oxygen vacancy in LaTa2-2xNb2xVO9-delta is discussed Полный текст |