CRYSTAL STRUCTURE OF TRIPLE MOLYBDATE IN THe Rb2MoO4-Nd2(MoO4)3-Zr(MoO4)2 SYSTEM
O. D. Chimitova, B. G. Bazarov, R. F. Klevtsova, A. G. Anshits, K. N. Fedorov, A. V. Dubentsov, T. A. Vereshchagina, Y. L. Tushinova, L. A. Glinskaya, Z. G. Bazarova, L. I. Gongorova
Keywords: rubidium, neodymium, zirconium, molybdate, synthesis, crystal structure
Pages: 179-182
Abstract
Using X-ray phase analysis, the Rb2MoO4-Nd2(MoO4)3-Zr(MoO4)2 ternary salt system is studied. The crystals of rubidium-neodymium-zirconium triple molybdate are grown by solution-melt crystallization under spontaneous nucleation. According to the X-ray diffraction data (automatic X8 APEX diffractometer, МоKα radiation, 1345 F(hkl), R = 0.0356), the crystal structure and its composition is determined: Rb4.7Nd0.7Zr1.3(MoO4)6. The sizes of the trigonal unit cell are as follows: a = b = 10.7561(2) Å, c = 38.7790(12) Å, V = 3885.41(16) Å3, Z = 6, space group. The three-dimensional mixed framework structure consists of Мо tetrahedra and two types of octahedra: (Nd,Zr)O6. The distribution of Nd3+ and Zr4+ cations over two crystallographic sites is also refined. Two types of rubidium atoms are located in large cavities of the framework.
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