Control of polymorphism in NaNbO3 by hydrothermal synthesis

Deena R. Modeshia; Richard J. Darton; Sharon E. Ashbrook; Richard I. Walton

doi:10.1039/B814601B

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Control of polymorphism in NaNbO₃ by hydrothermal synthesis†

Deena R. Modeshia,^a Richard J. Darton,^a Sharon E. Ashbrook^b and Richard I. Walton*^a

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* Corresponding authors

^a Department of Chemistry, University of Warwick, Coventry, UK
E-mail: r.i.walton@warwick.ac.uk
Fax: +44 2476524112
Tel: +44 2476523241

^b School of Chemistry and EaStCHEM, University of St Andrews, St Andrews, UK

Abstract

The metastable ilmenite polymorph of NaNbO₃, instead of the expected perovskite polymorph, may be prepared directly in one step under mild hydrothermal conditions by lowering pH and using close to stoichiometric amounts of metal precursors; in situ energy-dispersive X-ray diffraction shows that crystallisation occurs rapidly via a sequence of intermediate crystalline phases.

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Supplementary files

Details of NMR data collection, powder neutron structurerefinement, results of variable temperature powder XRD, fullanalysis of EDXRD data, TGA data, IR data and H NMR spectra. PDF (542K)

Article information

DOI: https://doi.org/10.1039/B814601B
Article type: Communication
Submitted: 21 Aug 2008
Accepted: 16 Oct 2008
First published: 12 Nov 2008

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Chem. Commun., 2009, 68-70

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Control of polymorphism in NaNbO₃ by hydrothermal synthesis

D. R. Modeshia, R. J. Darton, S. E. Ashbrook and R. I. Walton, Chem. Commun., 2009, 68 DOI: 10.1039/B814601B

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