Structure Determination of New Layered Perovskite Compound, NaLaTa2O7, Synthesized by Ion-Exchange Reaction

Kenji TODA; Kazuyoshi UEMATSU; Mineo SATO

doi:10.2109/jcersj.105.482

Structure Determination of New Layered Perovskite Compound, NaLaTa₂O₇, Synthesized by Ion-Exchange Reaction

Kenji TODA, Kazuyoshi UEMATSU, Mineo SATO

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Keywords: Layered perovskite, Ion-exchange reaction, Hydration, Crystal structure, Sodium lanthanum tantalate

JOURNAL FREE ACCESS

1997 Volume 105 Issue 1222 Pages 482-485

DOI https://doi.org/10.2109/jcersj.105.482

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Abstract

A new layered perovskite compound, NaLaTa₂O₇, was synthesized by ion-exchange reaction of the rubidium compound, RbLaTa₂O₇. The crystal structure of the compound was determined by the Rietveld analysis for powder X-ray diffraction pattern. The crystal structure is analogous to that of the corresponding niobate compound, NaLaNb₂O₇. This layered perovskite compound is a new member of the Dion-Jacobson series with n=2 for the general formula M[A_n-1B_nO_3n+1] (M=alkali metals).

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