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Synthesis and crystal structure of Na3.5Cr1.5Co0.5(PO4)3 phosphate

Published online by Cambridge University Press:  01 March 2012

Mohamed Chakir,
Abdelaziz El Jazouli and
Jean-Pierre Chaminade
Mohamed Chakir
Affiliation:
Laboratoire de Chimie des Matériaux Solides, Université Hassan II, Faculté des Sciences Ben M’Sik, Casablanca, Morocco
Abdelaziz El Jazouli
Affiliation:
Laboratoire de Chimie des Matériaux Solides, Université Hassan II, Faculté des Sciences Ben M’Sik, Casablanca, Morocco
Jean-Pierre Chaminade
Affiliation:
Institut de Chimie de la Matière Condensée de Bordeaux, CNRS, 87, Av. Dr. Schweitzer, 33608 Pessac, France
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Abstract

A new Nasicon phosphates series [Na3+xCr2−xCox(PO4)3(0⩽x⩽1)] was synthesized by a coprecipitation method and structurally characterized by powder X-ray diffraction. The selected compound Na3.5Cr1.5Co0.5(PO4)3 (x=0.5) crystallizes in the R3c space group with the following hexagonal unit-cell dimensions: ah=8.7285(3) Å, ch=21.580(2) Å, V=1423.8(1) Å3, and Z=6. This three-dimensional framework is built of PO4 tetrahedra and Cr∕CoO6 octahedra sharing corners. Na atoms occupy totally M(1) sites and partially M(2) sites.

Keywords

Nasiconcrystal structurepowder diffractionX-ray diffraction

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Type
Technical Articles
Information
Powder Diffraction , Volume 21 , Issue 3 , September 2006, pp. 210 - 213
Copyright
Copyright © Cambridge University Press 2006

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