Variable temperature neutron diffraction study of crystal structure and transport pathways in oxide ion conductors Bi12.5Ln1.5ReO24.5 (Ln=Lu, Er)

Charles H. Hervoches, Colin Greaves

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Abstract

Samples of highly conducting Bi12.5Lu1.5ReO24.5 and Bi12.5Er1.5ReO24.5 have been studied by neutron powder diffraction at room temperature for both phases and at 25 °C ≤ T ≤ 500 °C in the case of Bi12.5Er1.5ReO24.5. Both materials crystallize in the cubic δ-Bi2O3 related system, space group Fm-3m. Changes in the oxygen sublattice at 25 °C ≤ T ≤ 500 °C have been investigated by the Rietveld and maximum entropy methods.

Original languageEnglish
Pages (from-to)1-5
JournalSolid State Ionics
Volume254
Early online date7 Nov 2013
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • Bismuth oxide
  • Fluorite structure
  • Oxide ion conductor
  • Neutron diffraction
  • Maximum entropy method
  • Diffusion path

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