EL OMARI, Mohamed; RÉAU, Jean-Maurice; SÉNÉGAS, Jean; SEROV, T. V.; ARDASHNIKOVA, E. I.; DOLGIKH, V. A.

doi:10.1016/S0022-1139(01)00467-5

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EL OMARI, Mohamed
Department of Chemistry, Faculty of Science

RÉAU, Jean-Maurice
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

SÉNÉGAS, Jean
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Journal of Fluorine Chemistry. 2002, vol. 113, n° 1, p. 37-45

Elsevier

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Various compositions of the range of fluorite-type oxidefluoride solid solution in the NaF-BiF3-BiOF system are investigated by 19F NMR spectroscopy. Using the following formulation, Na0.5(1−z−h)Bi0.5(1+z+h)F2+z−hOh, this study is undertaken as a function of the anion excess (z) and the oxygen content (h). It results in the existence of two fluoride sublattices in the solid solution range. An approach to the nature of the fluorine-oxygen order is proposed when the compositions become richer and richer in BiOF. The clustering model is then extended to the homologous potassium oxidefluoride solid solutions.< Leer menos

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Oxides

fluorides

Ion conductors

19F NMR spectroscopy

Clustering

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The nature of anionic clusters in anion excess fluorite-type oxidefluoride solid solutions in MF-BiF3-BiOF systems (M = Na, K)

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