第四纪锂铁锰尖晶石氧化物中阳离子分布的同步加速器x射线衍射研究

Q2 Chemistry

Zeitschrift Fur Kristallographie Pub Date : 2007-11-01 DOI:10.1524/ZKSU.2007.2007.SUPPL_26.477

W. Nowicki, J. Darul, P. Piszora, C. Baehtz, E. Wolska

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引用次数: 0

摘要

采用固相法合成了LixMn3-x-yFeyO4系列的尖晶石单相固溶体，其范围为0.5≤x≤1.0和0.2≤y≤1.0。利用Rietveld剖面分析对高分辨率x射线衍射图进行细化，确定了晶格参数、原子间距离和阳离子分布。当Fe/(Fe+Mn)摩尔比分别为0.1和0.472时，Fe-for-Mn取代使尖晶石晶胞常数从a = 8.27A提高到a = 8.38A。当摩尔比为0 Fe/(Mn+Fe) 0.3时，锂离子完全占据了四面体位。

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Synchrotron X-ray diffraction study on the cation distribution in quaternary Li-Fe-Mn spinel oxides

Single phase spinel solid solutions of LixMn3-x-yFeyO4 series with range of 0.5≤x≤1.0 and 0.2≤y≤1.0, have been synthesized by a solid state reaction. By refining the high-resolution X-ray diffraction patterns with Rietveld profile analysis, the lattice parame- ters, interatomic distances and cation distribution were determined. The Fe-for-Mn substitu- tion increases the spinel unit cell constant from a = 8.27A to a = 8.38A, for the Fe/(Fe+Mn) mole ratio of 0.1 and 0.472, respectively. Evidence is given that the lithium ions occupy the tetrahedral sites exclusively, for the molar ratio 0� Fe/(Mn+Fe) � 0.3.

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来源期刊

Zeitschrift Fur Kristallographie 物理-晶体学

CiteScore

1.47

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Zeitschrift für Kristallographie International journal for structural, physical, and chemical aspects of crystalline materials ISSN 0044-2968 Founded in 1877 by Paul Groth Zeitschrift für Kristallographie is one of the world’s oldest scientific journals. In original papers, letters and review articles it presents results of theoretical or experimental study on crystallography.