Phase formation in the Dy2O3-HfO2-MoO3 system. Crystal structure of the new binary molybdate Dy2Hf2(MoO4)7 |
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| Authors: | S. F. Solodovnikov B. G. Bazarov E. Yu. Badmaeva Yu. L. Tushinova E. S. Zolotova Zh. G. Bazarova |
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| Affiliation: | (1) A. V. Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk;(2) Baikal Institute of Nature Utilization, Siberian Branch, Russian Academy of Sciences, Ulan-Ude;(3) Buryat State University, Ulan-Ude |
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| Abstract: | Phase relations have been studied for the subsolidus region of the Dy2O3-HfO2-MoO3 system; binary molybdates, Dy2Hf(MoO4)5 and Dy2Hf2(MoO4)7, were found to form. The crystal structure of the latter has been solved (a = 20.661(3)  , b = 9.816(1) , c = 13.796(3) ,  = 113.47(1)°, Z = 4, space group C2/c, R = 0.023) and found to be a new type of structure. In the structure, MoO4 tetrahedra are linked by their vertices with HfO6 octahedra and DyO8 tetragonal antiprisms to form a 3D open-work, in which one can isolate double-row tetrahedral and octahedral chains extended down the c axis.Original Russian Text Copyright © 2004 by S. F. Solodovnikov, B. G. Bazarov, E. Yu. Badmaeva, Yu. L. Tushinova, E. S. Zolotova, and Zh. G. BazarovaTranslated from Zhurnal Strukturnoi Khimii, Vol. 45, No. 4, pp. 692–697, July–August, 2004.This revised version was published online in April 2005 with a corrected cover date. |
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| Keywords: | dysprosium hafnium binary molybdates phase relations synthesis crystal structure |
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