Dielectric properties and structure of Bi4NbO8Cl and Bi4TaO8Cl

AM Kusainova, S Yu, ~Missing Data Stefanovich, VA Dolgikh, AV Mosunov, CH Hervoches, Philip Lightfoot

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

The layered intergrowth phases Bi4MO8Cl (M = Nb, Ta), structurally related to the well-known Aurivillius phase ferroelectrics, have been studied using SHG and a.c. impedance techniques. Both undergo a polar to centrosymmetric phase ferroelectric-type transition (T-c = 765 and 640 K for M = Nb and Ta, respectively). The crystal structure of the low temperature phase of Bi4NbO8Cl has been re-analysed, and a tentative structure for Bi4TaO8Cl determined, from powder neutron diffraction data. The basic structural features are confirmed, but significant details differ from the previously reported X-ray structure of Bi4NbO8Cl.

Original languageEnglish
Pages (from-to)1141-1145
Number of pages5
JournalJournal of Materials Chemistry
Volume11
Publication statusPublished - 2001

Keywords

  • BOND-VALENCE PARAMETERS
  • AURIVILLIUS PHASES
  • CRYSTAL-STRUCTURE

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