DOMBROVSKI, E. N.; SEROV, T. V.; ARDASHNIKOVA, E. I.; DOLGIKH, V. A.; EL OMARI, Malika; EL OMARI, Mohamed; ABAOUZ, A.; SÉNÉGAS, Jean; CHABAN, N. G.; ABAKUMOV, A. M.; VAN TENDELOO, Gustaaf

doi:10.1016/j.materresbull.2005.02.007

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DOMBROVSKI, E. N.
Department of Chemistry

SEROV, T. V.
Department of Chemistry

ARDASHNIKOVA, E. I.
Department of Chemistry

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Materials Research Bulletin. 2005, vol. 40, n° 5, p. 821-830

Elsevier

Résumé en anglais

A fluorite-like solid solution Ba1 − xBixOzF2 + x − 2z on the basis of cubic BaF2 was synthesised in the BaF2-Bi2O3-BiF3 system and the homogeneity range at 873 K was determined. The samples were studied by X-ray powder diffraction and electron diffraction, and their transport properties were measured by the complex impedance method at 300-623 K. Tendencies of variation of lattice parameters and transport properties were determined. These tendencies are discussed on the basis of a defect clustering hypothesis. Thermal treatment at 573 K of the solid solution, quenched from 873 K results in the formation of a new ordered tetragonal fluorite-like phase with lattice parameters a = 9.5355(4) Å, c = 18.151(1) Å.< Réduire

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Inorganic compounds

X-ray diffraction

Impedance spectroscopy

Electron diffraction

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Fluorite-like phases in the BaF2-BiF3-Bi2O3 system-synthesis, conductivity and defect clustering

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