FERNÁNDEZ-SANJULIÁN, Javier; CHENNABASAPPA, Madhu; GARCÍA-MARTÍN, Susana; NÉNERT, Gwilherm; WATTIAUX, Alain; GAUDIN, Etienne; TOULEMONDE, Olivier

doi:10.1039/C6DT03927H

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FERNÁNDEZ-SANJULIÁN, Javier
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Departemento Química Inorgánica

CHENNABASAPPA, Madhu
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

GARCÍA-MARTÍN, Susana
Departemento Química Inorgánica

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Dalton Transactions. 2017, vol. 46, n° 5, p. 1624-1633

Royal Society of Chemistry

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SrFe0.25Co0.75O2.63 was synthesized by a solid-state reaction. Its structural study at room temperature using conventional X-ray as well as neutron powder diffraction, electron diffraction and high-resolution transmission electron microscopy is presented. An oxygen-vacancy ordering related to the “314” model known for the Sr3Y1Co4O10.5 oxide is proposed despite neither an A-site ordering nor an A-site mismatch. By means of Mössbauer spectroscopy, Mohr salt titration and the difference in the neutron cross sections of Fe and Co, a cation distribution within the crystallographic sites as the following Sr4(Fe0.143+Co0.363+)48h(Fe0.114+Co0.144+Co0.253+)48fO10.52 is suggested, highlighting a natural layered structure with Fe and Co in higher oxidation states in the oxygen replete layers than in the oxygen deficient ones.< Leer menos

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Oxygen vacancy ordering in SrFe0.25Co0.75O2.63 perovskite material

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