High-Temperature Phase Transitions, Spectroscopic Properties, and Dimensionality Reduction in Rubidium Thorium Molybdate Family
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https://figshare.com/articles/dataset/High_Temperature_Phase_Transitions_Spectroscopic_Properties_and_Dimensionality_Reduction_in_Rubidium_Thorium_Molybdate_Family/2543407
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资源简介：
Four
new rubidium thorium molybdates have been synthesized by high-temperature
solid-state reactions. The crystal structures of Rb8Th(MoO4)6, Rb2Th(MoO4)3, Rb4Th(MoO4)4, and Rb4Th5(MoO4)12 were determined using
single-crystal X-ray diffraction. All these compounds construct from
MoO4 tetrahedra and ThO8 square antiprisms.
The studied compounds adopt the whole range of possible structure
dimensionalities from zero-dimensional (0D) to three-dimensional (3D):
finite clusters, chains, sheets, and frameworks. Rb8Th(MoO4)6 crystallizes in 0D containing clusters of [Th(MoO4)6]8–. The crystal structure
of Rb2Th(MoO4)3 is based upon one-dimensional
chains with configuration units of [Th(MoO4)3]2–. Two-dimensional sheets occur in compound Rb4Th(MoO4)4, and a 3D framework with channels
formed by thorium and molybdate polyhedra has been observed in Rb4Th5(MoO4)12. The Raman and
IR spectroscopic properties of these compounds are reported. Temperature-depended
phase transition effects were observed in Rb2Th(MoO4)3 and Rb4Th(MoO4)4 using thermogravimetry-differential scanning calorimetry analysis
and high-temperature powder diffraction methods.
创建时间：
2016-02-22
