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Titolo:
Oxygen deficiency and formation of a new ordered perovskite-based structure Sr(Sr0.5Sb0.5)O3-y
Autore:
Saidi, M; Moran, E; Amador, U; Gallardo-Amores, JM; Abboudi, M; Asskali, A;
Indirizzi:
Univ Abdelmalek Essaadi, FAc Sci & Tech Tanger, Dept Gen Chim, Tanger, Morocco Univ Abdelmalek Essaadi Tanger Morocco , Dept Gen Chim, Tanger, Morocco Univ Abdelmalek Essaadi, Fac Sci Tetouan, Dept Chim, Tetouan, Morocco UnivAbdelmalek Essaadi Tetouan Morocco an, Dept Chim, Tetouan, Morocco Univ Complutense Madrid, Dept Quim Inorgan, Fac CC Quim, Lab Complutense Altas Presiones, Madrid 28040, Spain Univ Complutense Madrid Madrid Spain 28040 resiones, Madrid 28040, Spain Univ San Pablo, Dept Quim Inorgan & Mat, FCC Expt & Tecn, CEU Urb Monteprincipe, Madrid 28668, Spain Univ San Pablo Madrid Spain 28668 Urb Monteprincipe, Madrid 28668, Spain
Titolo Testata:
INTERNATIONAL JOURNAL OF INORGANIC MATERIALS
fascicolo: 1, volume: 3, anno: 2001,
pagine: 1 - 7
SICI:
1466-6049(200101)3:1<1:ODAFOA>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUPERCONDUCTIVITY; FILMS; BISMUTH; TC;
Keywords:
inorganic compound; strontium and antimony mixed oxide; ordered perovskite; X-ray diffraction and crystal structure;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Moran, E Univ Abdelmalek Essaadi, FAc Sci & Tech Tanger, Dept Gen Chim, BP416, Tanger, Morocco Univ Abdelmalek Essaadi BP 416 Tanger Morocco , Tanger, Morocco
Citazione:
M. Saidi et al., "Oxygen deficiency and formation of a new ordered perovskite-based structure Sr(Sr0.5Sb0.5)O3-y", INT J INORG, 3(1), 2001, pp. 1-7

Abstract

A new oxygen-deficient and ordered perovskite-type structure with the formula Sr(Sr0.5Sb0.5)O3-y has been synthesized readily by a solid state reaction in air at 1200 degreesC. The structure of the Sr(Sr0.5Sb0.5)O3-y phase as determined by Rietveld analysis using X-ray diffraction data, correspondsto an ordered perovskite with face-centered cubic symmetry, space group Fm3m (no. 225) and lattice parameters, a = 8.3136(3) Angstrom, V = 574.602(3)Angstrom (3) and Z = 8. An important structural feature of Sr(Sr0.5Sb0.5)O3-y is the oxygen deficiency and the displacements of oxygen atoms from their ideal positions toward the Sb5+ cations. This fact leads to an alternating arrangement of larger [SrO6] and smaller [SbO6] octahedra (B-sites), theremaining Sr2+ being in the larger 12-fold coordinated A-sites. The thermal stability of the Sr(Sr0.5Sb0.5)O3-y phase is pointed out, its melting point being 1480 degreesC, and the subsequent quenching giving rise to a glassmaterial. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 30/09/20 alle ore 11:46:43