Вид документа : Статья из журнала Шифр издания : 54/D 26 Автор(ы) : Davydov D. A., Gusev A. I. Заглавие : DO3-Type Cubic Structure of Nonstoichiometric Vanadium Monoxide Место публикации : JETP Letters. - 2010. - Vol. 91, № 6. - С. 286-291: il. Примечания : Bibliogr. : p. 291 (19 ref.) ISSN: 0021-3640 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): монооксид ванадия--нестехиометрия Аннотация: An X-ray diffraction study indicates that nonstoichiometric vanadium monoxide VOy ≡ VxOz (y = z/x) has a cubic structure of the DO3 type (space group Fm m), where vanadium atoms are not only at the 4(a) sites of the metal fcc sublattice, but also at the tetrahedral 8(c) sites. This circumstance fundamentally distinguishes monoxide VOy from strongly nonstoichiometric MXy compounds with the B1 structure and the same space group, where atoms M and X and structural vacancies and of the metal and nonmetal sublattices, respectively, are distributed over the 4(a) and 4(b) sites. The dependence of the filling factor q of the tetrahedral interstices by vanadium atoms on the relative content y of oxygen in VOy has been obtained. It has been shown that the composition of cubic vanadium monoxide should be represented as VOy ≡ VxOz ≡ Vx – 2q 1 – x + 2qOz 1 –z, taking into account the structure Доп.точки доступа: Gusev, A. I.; Гусев Александр Иванович