Synthesis,crystal structure,and electrical properties of the new ternary molybdate Rb5NdHf(MoO4)6 |
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| Authors: | O. D. Chimitova B. G. Bazarov R. F. Klevtsova K. N. Fedorov L. A. Glinskaya M. V. Kuznetsov Zh. G. Bazarova |
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| Affiliation: | (1) Baikal Institute of Nature Management, Siberian Branch of the Russian Academy of Sciences, 8 ul. Sakh’yanovoi, 670047 Ulan-Ude, Russian Federation;(2) A. V. Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3 prosp. Akad. Lavrent’eva, 630090 Novosibirsk, Russian Federation;(3) Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, 8 ul. Institutskaya, 142432 Chernogolovka, Moscow Region, Russian Federation |
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| Abstract: | The subsolidus phase relations in the ternary salt system Rb2MoO4-Nd2(MoO4)3-Hf(MoO4)2 were studied by X-ray powder diffraction. The ternary molybdates Rb5NdHf(MoO4)6 (1) and Rb2NdHf2(MoO4)6.5 are formed in this system. Compound 1 without impurities was synthesized by the solid-phase method by varying the temperature in the range of 400–600 °C and the annealing time from 70 to 110 h. Single crystals of compound 1 were grown by the flux method. The structure of compound 1 was established and the electrical properties of ceramic samples of this compound were investigated. This ternary molybdate has mixed electronic-ionic conductivity with the ionic component predominating at 200–500 °C. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2063–2066, November, 2007. |
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| Keywords: | rubidium neodymium hafnium ternary molybdates phase equilibria crystal structure trigonal system electronic-ionic conductivity |
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