Crystal structure of Tl2[(UO2)2(MoO 4)3] and crystal chemistry of the compounds M 2[(UO2)2(MoO4)3] (M = Tl, Rb, Cs)

被引：15

作者：

Nazarchuk E.V. ^{[1
]}

Krivovichev S.V. ^{[1
]}

Burns P.C. ^{[2
]}

机构：

[1] St. Peteresburg State University, St. Petersburg

[2] Department of Civil Engineering and Geological Sciences, University of Notre Dame, Notre Dame

来源：

Radiochemistry | 2005年 / 47卷 / 5期

关键词：

Reflection; Crystal Structure; Structural Motif; Coordination Polyhedron; Crystal Chemistry;

D O I：

10.1007/s11137-005-0115-5

中图分类号：

学科分类号：

摘要：

A new compound, Tl2[(UO2)2(MoO 4)3], was prepared by a solid-phase reaction. The compound crystallizes in a rhombic system, space group Pna21, a = 20.1296(9), b = 8.2811(4), c = 9.7045(4) Å, V = 1617.69(13) Å3, Z = 4. The crystal structrue was solved by the direct method and refined to R 1 = 0. 04 for 4884 unique reflections. The structural motif is a framework consisting of UO7 pentagonal bipyramids and MoO4 tetrahedra. The Tl coordination polyhedra are irregular, with seven and eight vertices. Large channels of the size 6 x 10.8 Å, occupied by Tl + cations, are arranged parallel to the [001] direction. The compound is isostructural to the previously described α-Cs2(UO 2)2(MoO4)3 and Rb 2(UO2)2 (MoO4)3. ©2005 Pleiades Publishing, Inc.

引用

页码：447 / 451

页数：4

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