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Rietveld refinement of the gadolinium strontium oxide SrGd2O4

Published online by Cambridge University Press:  05 March 2012

H. Chaker ,
A. Kabadou ,
M. Toumi  and
R. Ben Hassen
H. Chaker
Affiliation:
Laboratoire des Sciences des Matériaux et d’Environnement, Faculté des Sciences de Sfax, 3018 Sfax, Tunisia
A. Kabadou
Affiliation:
Laboratoire des Sciences des Matériaux et d’Environnement, Faculté des Sciences de Sfax, 3018 Sfax, Tunisia
M. Toumi
Affiliation:
Laboratoire de Chimie Inorganique et Structurale, Faculté des Sciences de Bizerte, Bizerte, Tunisia
R. Ben Hassen*
Affiliation:
Laboratoire des Sciences des Matériaux et d’Environnement, Faculté des Sciences de Sfax, 3018 Sfax, Tunisia
*
a)Author to whom correspondence should be addressed; electronic mail: [email protected]
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Abstract

Powder X-ray diffraction (XRD) data were collected for a new phase of SrGd2O4. Analysis using the Rietveld method was carried out and it was found that the sample crystallizes in the orthorhombic symmetry with CaFe2O4 related structure. The lattice parameters are found to be a=12.0521(2) Å, b=10.1327(2) Å, c=3.4757(4) Å and Z=4. For X-ray data RF=4.9%, RB=7.6%, RP=8.1% and χ2=1.51. The structure can be described as an assembly of bioctahedron [Gd2O10] which are linked together by O2− anions and of dodecahedron of SrO8.

Keywords

Rietveld methodspinel structureX-ray powder diffraction
Type
Technical Articles
Information
Powder Diffraction , Volume 18 , Issue 4 , December 2003 , pp. 288 - 292
Copyright
Copyright © Cambridge University Press 2003

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