Crystal Structure of the (K0.87Bi0.13)BiO3Superconductor

N. R. Khasanova, F. Izumi, T. Kamiyama, K. Yoshida, A. Yamamoto, S. Tajima

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Abstract

The structure of a superconducting oxide (K0.87Bi0.13)BiO3(Tc≈10.2 K) prepared under high pressure was analyzed by time-of-flight neutron powder diffraction. Rietveld refinement showed this compound to be a cubic perovskiteABO3with space groupPm3m(No. 221) and lattice parametera=4.23377(3) Å. Refinement of occupation factors revealed the absence of oxygen vacancies and the substitution of Bi3+ions for 13% of K+ions at theAsite, presenting evidence for electron doping in this superconductor. Extraordinarily large atomic displacement parameters for theAand O sites are believed to reflect pronounced positional disorder mainly arising from the large difference in size between the K+and Bi3+ions.

Original languageEnglish
Pages (from-to)205-208
Number of pages4
JournalJournal of Solid State Chemistry
Volume144
Issue number1
DOIs
Publication statusPublished - 1999 Apr 1

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Khasanova, N. R., Izumi, F., Kamiyama, T., Yoshida, K., Yamamoto, A., & Tajima, S. (1999). Crystal Structure of the (K0.87Bi0.13)BiO3Superconductor. Journal of Solid State Chemistry, 144(1), 205-208. https://doi.org/10.1006/jssc.1998.8170