Identifying characteristics of the fibrous cesium titanate Cs2Ti5O11

L. A. Bursill, David Smith, Jadwiga Kwiatkowska

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Electron microscopic studies of the fibrous cesium titanate Cs2Ti5O11 reveal characteristic features not readily apparent using standard methods of phase analysis (optical microscopy, X-ray diffraction). Its fibrous needle-like laths give characteristic diffuse scattering, complicating the indexing of electron diffraction patterns. The hydrated form Cs2Ti5O11 · (1 + x)H2O (0.5 < x < 1) is typically grossly distorted, resembling pyrolytic graphite. Cs2Ti5O11 is unstable when stored under ambient conditions at room temperature for ∼1 year when disproportionation into Cs2Ti4O9 and Cs2Ti6O11 · nH2O occurs. The structure of Cs2Ti5O11 and intergrowth defects in the unstable forms have been studied by high-resolution electron microscopy. It is evident that these phases would be undesirable in titanate ceramics such as SYNROC, which are designed for immobilization of radioactive 137Cs.

Original languageEnglish (US)
Pages (from-to)360-368
Number of pages9
JournalJournal of Solid State Chemistry
Volume69
Issue number2
DOIs
StatePublished - Aug 1987

ASJC Scopus subject areas

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

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