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Structural and spectroscopic study of NaSbR(PO4)3 (R = Cr, Fe, In) phases

Published online by Cambridge University Press:  14 November 2013

Abderrahim Aatiq*
Affiliation:
Département de Chimie, Laboratoire de Physico-Chimie des Matériaux Appliqués, Université HassanII-Mohammédia, Faculté des Sciences Ben M'Sik, Avenue Idriss El harti, B.P. 7955, Casablanca, Morocco
My Rachid Tigha
Affiliation:
Département de Chimie, Laboratoire de Physico-Chimie des Matériaux Appliqués, Université HassanII-Mohammédia, Faculté des Sciences Ben M'Sik, Avenue Idriss El harti, B.P. 7955, Casablanca, Morocco
*
a)Electronic-mail:a_aatiq@yahoo.fr Fax : +212-522 70 46 75

Abstract

Crystallographic structures of the three NaSbR(PO4)3 (R = Cr, Fe, In) phases were determined at room temperature from X-ray powder diffraction (XRD) data using the Rietveld analysis. The three compounds belong to the Nasicon structural family. The presence of the (303) reflection in all XRD spectra of NaSbR(PO4)3 shows clearly that all compounds crystallise in rhombohedral system with R3 space group. Na atoms are practically ordered within the two positions, 3a and 3b, of M1 sites. Structure refinements show also a partially-ordered distribution of Sb5+ and R3+ ions within the Nasicon framework. A Raman and Infrared spectroscopic study was used to obtain further structural information about the nature of bonding in NaSbR(PO4)3 (R = Cr, Fe, In) phases.

Type
Technical Articles
Copyright
Copyright © International Centre for Diffraction Data 2013 

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