Crystal structure of the new borate Li3Gd(BO3)2.: Comparison with the homologous Na3Ln(BO3)2 (Ln: La, Nd) compounds

被引：27
作者：
Jubera, V [1 ]
Gravereau, P [1 ]
Chaminade, JP [1 ]
机构：
[1] Univ Bordeaux 1, Inst Chim Mat Condensee, CNRS, ICMCB,UPR 9048, F-33608 Pessac, France
来源：
SOLID STATE SCIENCES | 2001年 / 3卷 / 04期
关键词：
crystal structure; borate of lithium and gadolinium;
D O I：
10.1016/S1293-2558(01)01156-6
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The structure of Li3Gd(BO3)(2) has been solved by X-ray diffraction study on single crystal. This novel borate crystallizes in the monoclinic system with the P2(1)/c space group (Z = 4). The cell parameters are respectively equal to a = 8.724(2), b = 6.425(2), c = 10.095(2) Angstrom and beta = 116.85(2)degrees. Refinements of 110 parameters using 2924 independent reflections having I > 2 sigma (I) converged to R-1 = 0.028 (omegaR(2) = 0.058). The structure of Li-3 Gd(BO3)(2) is made up of double layers of eightfold coordinated Gd atoms parallel to the (bc) plane. They are linked by respectively three- and four-coordinated boron and lithium atoms. The structure is compared to that of the homologous sodium compounds, Na(3)Ln(BO3)(2) (Ln: La, Nd), in which LnO(8) polyhedra also form a bi-dimensional array. (C) 2001 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
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页码：469 / 475
页数：7
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