Issue 4, 2002
From the journal:

Journal of Materials Chemistry

Jong-Young Kim,a   In Chung,a   Seung-Joo Kima  and  Jin-Ho Choy*a  

* Corresponding authors

a National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, College of Natural Sciences, Seoul National University, Seoul, Korea
E-mail: jhchoy@plaza.snu.ac.kr
Fax: +82–2–872–9864
Tel: +82–2–880–6658

Abstract

New pyrochlore-type oxides, ASrNb2O6.5 (A = Li and Na), were prepared from Dion–Jacobson-type layered perovskite oxyfluorides, ASrNb2O6F. The prototype layered perovskite phases are transformed into anion-deficient pyrochlore-type oxides by heating above 600 °C in air. The ASrNb2O6F (A = Rb and K) and RbCaNb2O6F compounds have the layered perovskite structure, whereas the pyrochlore structure is found to be more stable than the layered perovskite in the AF–SrNb2O6 (A = Li and Na) and KF–CaNb2O6 systems.

Graphical abstract: Transformation of Dion–Jacobson-type layered oxyfluorides into new anion-deficient pyrochlore-type oxides, ASrNb2O6.5 (A = Li and Na)

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Article information

DOI
https://doi.org/10.1039/B107254B
Article type
Paper
Submitted
09 Aug 2001
Accepted
24 Jan 2002
First published
04 Mar 2002

J. Mater. Chem., 2002,12, 1001-1004

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Transformation of Dion–Jacobson-type layered oxyfluorides into new anion-deficient pyrochlore-type oxides, ASrNb2O6.5 (A = Li and Na)

J. Kim, I. Chung, S. Kim and J. Choy, J. Mater. Chem., 2002, 12, 1001 DOI: 10.1039/B107254B

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