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The Double Molybdate Rb 2 Ba(MoO 4 ) 2 : Synthesis, Crystal Structure, Optical, Thermal, Vibrational Properties, and Electronic Structure
Author(s) -
Zhou Molin,
Jiang Xingxing,
Li Chao,
Lin Zheshuai,
Yao Jiyong,
Wu Yicheng
Publication year - 2015
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201500552
Subject(s) - molybdate , isostructural , raman spectroscopy , crystallography , octahedron , rubidium , crystal structure , melting point , space group , band gap , chemistry , single crystal , analytical chemistry (journal) , materials science , x ray crystallography , diffraction , inorganic chemistry , optics , physics , chromatography , organic chemistry , optoelectronics , potassium
The double molybdate Rb 2 Ba(MoO 4 ) 2 was synthesized by high temperature solid‐state reaction. According to the single‐crystal X‐ray diffraction structure determination, it is isostructural to the mineral Palmierite K 2 Pb(SO 4 ) 2 in the trigonal space group R $\bar{3}$ m . Its structure can be described as layers of MoO 4 tetrahedra corner‐sharing with distorted BaO 6 octahedra, while the layers are separated by bi‐layers of rubidium cations in 10‐coordinate environment. UV/Vis‐NIR spectroscopy measurement indicates that Rb 2 Ba(MoO 4 ) 2 has an indirect bandgap of 4.40 eV, comparable to the calculated value 4.21 eV. The DSC test demonstrates the melting point and incongruent melting characteristic of the title compound. About seven narrow Raman lines were observed in the Raman spectrum recorded for Rb 2 Ba(MoO 4 ) 2 powder sample.