Intergrowths and defect structures in Bi9Ti3Fe5O27 revealed by high‐resolution electron microscopy

David Smith, John L. Hutchison

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

A high‐resolution 500 kV study of the long‐period (n = 8) perovskite Bi9Ti3Fe5O27 has revealed a variety of order/disorder effects, in marked contrast to low‐n materials, as well as the occurrence of a new two‐dimensional superlattice structure corresponding to a 3 × d110 ordering along the bismuthate layers. Intergrowths of the 2‐D SL phase with the ‘usual’ perovskite/bismuthate phase, as well as sharp interfaces between these two phases, were observed and the common occurrence of steps along these interfaces suggested ledge migration as one possible transformation mechanism. Coherent intergrowths of structural elements rather similar to tetragonal‐tungsten‐bronze (TTB)‐type were also found and these sometimes appeared to be relics of the super‐lattice phase. The chemical implications of the sevarious observations are briefly discussed. 1983 Blackwell Science Ltd

Original languageEnglish (US)
Pages (from-to)285-293
Number of pages9
JournalJournal of Microscopy
Volume129
Issue number3
DOIs
StatePublished - 1983
Externally publishedYes

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Keywords

  • 2‐D superlattice intergrowths
  • HREM
  • long‐period
  • perovskite

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology

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