期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 180, 期 3, 页码 995-1001出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2006.12.030
关键词
perovskite; titanates; neutron diffraction; quantum paraelectrics
Neutron powder diffraction studies of Na1/2La1/2TiO3 and Na1/2Tb1/2TiO3, and a synchrotron X-ray powder diffraction study of Na1/2Eu1/2TiO3 have been carried out. Rietveld refinement of the structures confirmed that Na1/2Eu1/2TiO3 and Na1/2Tb1/2TiO3 crystallizes in GdFeO3 type of structure (space group Pbnm). The ambiguity in the literature regarding the crystal structure of Na-1/2 La1/2TiO3 has been resolved and the correct space group is found to be R3c. A detailed list of refined structural parameters of these compounds is presented for the first time. (c) 2007 Elsevier Inc. All rights reserved.
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