Re-Investigation of the Structure of 7Bi2O3 · 2WO3 by Single-Crystal X-ray Diffraction - Archive ouverte HAL Access content directly
Journal Articles Crystal Research and Technology Year : 2002

Re-Investigation of the Structure of 7Bi2O3 · 2WO3 by Single-Crystal X-ray Diffraction

Akiteru Watanabe
  • Function : Author
Y. Suetsugu
  • Function : Author

Abstract

The structure of the oxygen-deficient compound 7Bi2O3 · 2WO3, a fluorite-derivative phase considered a candidate for electronic applications because of its high ionic conductivity, is investigated by singlecrystal X-Ray diffraction employing Ag-Kα radiation (λ = 0.5608 Å) to minimize the effect of the absorption by the heavy metals. The space-group type is I41, the acentric subgroup of I41/a that was previously suggested from powder-diffraction data and precession-camera photographs. Lattice parameters are a = 12.513(2), c = 11.231(4) (Z = 2.5). The sample is twinned by syngonic merohedry, class I, with volume ratio of the individuals 0.58/0.42. The ordering of W partly confirms previous models, with one W fully occupying one of the sites on special position. However, the remaining W goes in a site on general position, which shares with Bi, resulting thus more diluted in the structure. The oxygen vacancies are partly ordered in three of the ten anion sites.
Not file

Dates and versions

hal-01715575 , version 1 (22-02-2018)

Identifiers

  • HAL Id : hal-01715575 , version 1

Cite

Massimo Nespolo, Akiteru Watanabe, Y. Suetsugu. Re-Investigation of the Structure of 7Bi2O3 · 2WO3 by Single-Crystal X-ray Diffraction. Crystal Research and Technology, 2002, 37 (4), pp.414-422. ⟨hal-01715575⟩
17 View
0 Download

Share

Gmail Facebook Twitter LinkedIn More