Add time:08/26/2019         Source:sciencedirect.com

In Cs–Mo–O system, Cs2MonO3n+1 (n = 1, 3, 5 and 7) were prepared by solid state route and n = 7 was established as the highest stable analog. Differential thermal analysis of the compound Cs2MoO4 (n = 1) in air showed a reversible phase transition followed by melting whereas compounds with n = 3, 5 and 7 did not show any phase transition up to their melting temperatures. Thermal expansion of all the molybdates were studied in vacuum using high temperature X-ray diffraction method. In quaternary Cs–Th–Mo–O system, Cs2Th(MoO4)3 and Cs4Th(MoO4)4 were synthesized by reacting cesium molybdate and thorium molybdate in 1:1 and 2:1 M ratios, respectively, at 873 K in air. Both compounds did not show any phase transition up to the melting and the compounds showed positive thermal expansion when heated in vacuum in the temperature range of 298–873 K.

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