期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 177, 期 9, 页码 2973-2976出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2004.04.056
关键词
perovskites; X-ray powder diffraction; crystal structure
The room temperature structure of perovskite CeAlO3 has been reinvestigated by X-ray powder diffraction. The Rietveld refinement has confirmed the tetragonal symmetry; but revealed a super cell, a = 5.32489(6) Angstrom and c = 7.58976(10) Angstrom, with the space group I4/mcm. In CeAlO3, the distortion from the ideal cubic perovskite is caused by the cooperative tilting of the AlO6 octahedra around the primitive cubic [001](p)-axis. (C) 2004 Elsevier Inc. All rights reserved.
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