CobaltMaghrebV1, France, Analysis, bibRecord, 000128

Structural and vibrational study of C-type doped rare earth sesquioxide Yb2-xCoxO3

Identifieur interne : 000128 ( France/Analysis ); précédent : 000127; suivant : 000129

Structural and vibrational study of C-type doped rare earth sesquioxide Yb2-xCoxO3

Auteurs : L. Ben Farhat [Tunisie] ; M. Amami [Tunisie] ; E. K. Hlil [France] ; R. Ben Hassen [Tunisie]

Source :

Journal of alloys and compounds [ 0925-8388 ] ; 2009.

RBID : Pascal:10-0029068

Descripteurs français

Pascal (Inist)
- Composition chimique, Procédé sol gel, Diffraction RX, Solubilité, Paramètre cristallin, Groupe espace, Spectre Raman, Coordinence, Structure cristalline, Cobalt Yttrium Oxyde Mixte, Mode vibration, Polycristal, Solution solide.

English descriptors

KwdEn :
- Chemical composition, Cobalt Yttrium Oxides Mixed, Coordination number, Crystal structure, Lattice parameters, Polycrystals, Raman spectra, Sol-gel process, Solid solutions, Solubility, Space groups, Vibrational modes, XRD.

Abstract

Polycrystalline samples with general formula Yb_2-xCo_x O₃ (0 < x < 0.6), obtained by sol-gel method and analysed by X-ray diffraction, formed solid solutions over all the mentioned range. Co showed a maximum solubility of 30 mol% in Yb₂O₃ sesquioxide. The lattice parameters are found to vary linearly with the composition x. The cationic distribution over the two non-equivalent sites 8b and 24d of the space group Ia-3 is found to be preferentially. Replacing Yb³⁺ by Co³⁺ introduces slight changes in the atomic coordinates leading to an increase of the mean cation-anion distances. The ability of Raman spectroscopy to detect changes in local co-ordination is utilized. A pseudo-tetrahedral coordination for the Co³⁺ in the 24d site was found.

Affiliations:

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Pascal:10-0029068

Le document en format XML

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Co<sub>x</sub>
O<sub>3</sub>
</title>
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Co<sub>x</sub>
O<sub>3</sub>
</title>
<author><name sortKey="Farhat, L Ben" sort="Farhat, L Ben" uniqKey="Farhat L" first="L. Ben" last="Farhat">L. Ben Farhat</name>
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<s3>TUN</s3>
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<author><name sortKey="Hassen, R Ben" sort="Hassen, R Ben" uniqKey="Hassen R" first="R. Ben" last="Hassen">R. Ben Hassen</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Unité de Recherche de Chimie des Matériaux, ISSBAT, Université Tunis-AlManar, 9 Rue Docteur Zouheir Safi</s1>
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<s3>TUN</s3>
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<series><title level="j" type="main">Journal of alloys and compounds</title>
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<term>Cobalt Yttrium Oxides Mixed</term>
<term>Coordination number</term>
<term>Crystal structure</term>
<term>Lattice parameters</term>
<term>Polycrystals</term>
<term>Raman spectra</term>
<term>Sol-gel process</term>
<term>Solid solutions</term>
<term>Solubility</term>
<term>Space groups</term>
<term>Vibrational modes</term>
<term>XRD</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Composition chimique</term>
<term>Procédé sol gel</term>
<term>Diffraction RX</term>
<term>Solubilité</term>
<term>Paramètre cristallin</term>
<term>Groupe espace</term>
<term>Spectre Raman</term>
<term>Coordinence</term>
<term>Structure cristalline</term>
<term>Cobalt Yttrium Oxyde Mixte</term>
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<front><div type="abstract" xml:lang="en">Polycrystalline samples with general formula Yb<sub>2-x</sub>
Co<sub>x</sub>
 O<sub>3</sub>
 (0 < x < 0.6), obtained by sol-gel method and analysed by X-ray diffraction, formed solid solutions over all the mentioned range. Co showed a maximum solubility of 30 mol% in Yb<sub>2</sub>
O<sub>3</sub>
 sesquioxide. The lattice parameters are found to vary linearly with the composition x. The cationic distribution over the two non-equivalent sites 8b and 24d of the space group Ia-3 is found to be preferentially. Replacing Yb<sup>3+</sup>
 by Co<sup>3+</sup>
 introduces slight changes in the atomic coordinates leading to an increase of the mean cation-anion distances. The ability of Raman spectroscopy to detect changes in local co-ordination is utilized. A pseudo-tetrahedral coordination for the Co<sup>3+</sup>
 in the 24d site was found.</div>
</front>
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<country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="Hlil, E K" sort="Hlil, E K" uniqKey="Hlil E" first="E. K." last="Hlil">E. K. Hlil</name>
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Structural and vibrational study of C-type doped rare earth sesquioxide Yb2-xCoxO3

Structural and vibrational study of C-type doped rare earth sesquioxide Yb2-xCoxO3

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri