Вид документа : Статья из журнала Шифр издания : 54/V 18 Автор(ы) : Voronin V. I., Goshchitskii B. N., Mitberg E. B., Leonidov I. A., Kozhevnikov V. L. Заглавие : Valence state of cobalt atoms and crystal structure of YBa2Cu3-xCoxO6+delta solid solution Место публикации : Journal of Structural Chemistry. - 2000. - Vol. 41, № 4. - С. 626-631: il. Примечания : Bibliogr. : p. 631 (19 ref.) ISSN: 0022-4766 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): кобальт--твердые растворы--иттрий-бариевый купрат Аннотация: The crystal structure of YBa2Cu3-xCox06+delta solid solutions, where x = 0.2, 0.4, 0.6, and 0.8, was studied by powder neutron diffraction. The charged states of the cations were calculated using the interatomic distances obtained in neutron diffraction measurements. It is shown that cobalt in the Cul position has valence 3+ and octahedral environment for x = 0.2 and 0.4. As x increases, the valence of some cobalt ions in the above positions changes to 4+, the environment changes to tetrahedral, and copper in the Cu2 position is partly substituted. Cobalt in the Cu2 positions has valence 2+ and does not change the square pyramidal arrangement of oxygen ions surrounding this position Доп.точки доступа: Voronin, V. I.; Goshchitskii, B. N.; Mitberg, E. B.; Leonidov, I. A.; Леонидов Илья Аркадьевич; Kozhevnikov, V. L.; Кожевников Виктор Леонидович