Single crystal structure refinement of a magnesium niobium oxide:: Mg4Nb2O9

被引：56

作者：

Kumada, N ^{[1
]}

Taki, K ^{[1
]}

Kinomura, N ^{[1
]}

机构：

[1] Univ Yamanashi, Fac Engn, Kofu, Yamanashi 4008511, Japan

来源：

MATERIALS RESEARCH BULLETIN | 2000年 / 35卷 / 07期

关键词：

oxides; X-ray diffraction; crystal structure;

D O I：

10.1016/S0025-5408(00)00300-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Single crystals of the magnesium niobium oxide Mg4Nb2O9 were prepared at 1400 degrees C. This compound has the ordered corundum structure with the space group P (3) over bar c1 (No. 165) and the lattice parameters are a = 5.1612(7) and c = 14.028(1) Angstrom. The final R-factors were R = 0.032 and R-w = 0.031 for 1092 unique reflections. The face-shared octahedra are occupied by the same cations and the cation is ordered in the way of an alternative stacking of two layers of a mixture of Mg and Nb (1:1) and one layer of Mg along the c axis. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1017 / 1021

页数：5

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