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Synthesis, crystal structure and vibrational spectra of Sr0.5Zr2(AsO4)3

Published online by Cambridge University Press:  29 February 2012

A. Jrifi ,
A. El Jazouli ,
J. P. Chaminade  and
M. Couzi
A. Jrifi
Affiliation:
Laboratoire de Chimie des Matériaux Solides, Faculté des Sciences Men M’Sik, Université Hassan II-Mohammedia, Avenue Idriss El Harti, Casablanca, Morocco
A. El Jazouli
Affiliation:
Laboratoire de Chimie des Matériaux Solides, Faculté des Sciences Men M’Sik, Université Hassan II-Mohammedia, Avenue Idriss El Harti, Casablanca, Morocco
J. P. Chaminade
Affiliation:
CNRS, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université Bordeaux, 87 Avenue Albert Schweitzer, 33608 Pessac, France
M. Couzi*
Affiliation:
Institut des Sciences Moléculaires, Université Bordeaux 1, CNRS UMR 5255, Batiment A12, 351 cours de la libération, 33405 Talence Cedex, France
*
a)Author to whom correspondence should be addressed. Electronic mail: [email protected]
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Abstract

Sr0.5Zr2(AsO4)3 arsenate was prepared and structurally characterized by powder X-ray diffraction and by Raman and infrared spectroscopies. Its structure, which belongs to the Nasicon-type family, was refined by the Rietveld method in the R-3 space group, from X-ray powder diffraction data. The hexagonal unit-cell parameters were determined to be ah=8.965(2) Å, ch=23.955(6) Å, V=1667.43(6) Å3, and Z=6. The structure is formed by an ionic three-dimensional network of AsO4 tetrahedra and ZrO6 octahedra linked by corners with Sr2+ ions occupying half of the M1 sites in an ordered manner. Raman and infrared spectra were recorded and assignments of the stretching and bending vibrations of the AsO43− tetrahedra were made. The number of the peaks observed is in good agreement with that predicted by the factor-group analysis of the R-3 space group.

Keywords

nasiconarsenatecrystal structurepowder diffractionRamaninfrared
Type
Technical Articles
Information
Powder Diffraction , Volume 24 , Issue 3 , September 2009 , pp. 200 - 204
Copyright
Copyright © Cambridge University Press 2009

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