Crystal structure of the new barium borate Ba5(BO3)2(B2O5)

被引：0
|
作者：
N. G. Furmanova
B. A. Maksimov
V. N. Molchanov
A. E. Kokh
N. G. Kononova
P. P. Fedorov
机构：
[1] Russian Academy of Sciences,Shubnikov Institute of Crystallography
[2] Russian Academy of Sciences,Institute of Mineralogy and Petrography, Siberian Division
[3] Russian Academy of Sciences,General Physics Institute
来源：
Crystallography Reports | 2006年 / 51卷
关键词：
61.66.Fn;
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摘要：
The crystal structure of the new barium borate Ba5(BO3)2(B2O5) is established (R = 0.0436). Single crystals were grown by spontaneous crystallization in the BaO-B2O3-Na2O system using the flux method. This compound crystallizes in the orthorhombic system, sp. gr. P212121; the unit-cell parameters are a = 9.590(2) Å, b = 16.659(3) Å, c = 22.919(6) Å, and Z = 12. The structure consists of coordination polyhedra of barium cations and the anionic groups [BO3] (planar triangles) and [B2O5] (vertex-sharing double [BO3] triangles), which form a pseudohexagonal framework. Melting of barium borate occurs by a peritectic reaction at 1170 ± 10°C.
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页码：219 / 224
页数：5
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