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新層状ペロブスカイト化合物LiLaTiO4及びLiEuTiO4
New Layered Perovskite Compounds, LiLaTiO4 and LiEuTiO4
Toda, Kenji
43953
Kurita, Satoru
43954
Sato, Mineo
43955
Layered perovskite
Ion exchange
Crystal structure
Lithium lanthanum titanate
Lithium europium
New layered perovskite compounds, LiLnTiO4 (Ln=La and Eu), have been synthesized by an ion-exchange reaction from parent sodium compounds, NaLnTiO4. The crystal structures of LiLaTiO4 and LiEuTiO4 were determined by Rietveld analysis of the powder X-ray diffraction (XRD) patterns. The lithium ion-exchanged compounds retain the crystal symmetry of the parent phases. Although the framework of the perovskite layer of these compounds is the same as that of the parent compounds, there exists a fundamental difference. The lithium ions within the interlayer have a tetrahedral coordination because of small ionic radius for a rock-salt coordination. The structure of LiLaTiO4 and LiEuTiO4 consist of intergrowths of the perovskite sheets with the layers of Li-O in a tetrahedral coordination and those of Ln-O in a distorted rock-salt coordination. These compounds exhibit new phases analogous to the Ruddlesden-Popper phase.
journal article
日本セラミックス協会
1996-02
application/pdf
日本セラミックス協会学術論文誌
1206
104
140
142
AN10040326
0914-5400
https://niigata-u.repo.nii.ac.jp/record/3603/files/104_1206_140-142.pdf
eng
https://doi.org/10.2109/jcersj.104.140
https://www.jstage.jst.go.jp/browse/jcersj/104/1206/_contents/-char/ja/
本文データは学協会の許諾に基づきJ-Stageから複製したものである