N 52 New MnO{Nb(Ta)2O5 phases produced at high pressures and temperatures / N. V. Tarakina, A. P. Tyutyunnik, T. V. D'yachkova, V. G. Zubkov, Yu. G. Zainulin, M. J. Sayagues, G. Svensson // Journal of Structural Chemistry. - 2003. - Vol. 44, № 2. - P252-255 : il. - Bibliogr. : p. 255 (11 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): НИОБАТЫ -- ТАНТАЛАТЫ -- ЭЛЕКТРОННАЯ СТРУКТУРА -- ЭЛЕКТРОННАЯ ДИФРАКЦИЯ -- РЕНТГЕНОВСКАЯ ДИФРАКЦИЯ -- ВЫСОКОЕ ДАВЛЕНИЕ Аннотация: Phase formation at high pressures and temperatures were studied in the MnO{Nb(Ta)2O5 system. New rhombohedral modifications of Mn4Nb2O9 and Mn4Ta2O9, two new modi cations of MnTa2O6, and two modifications of Mn2Ta2O7 were obtained. They were structurally identified Полный текст |