Identifying characteristics of the fibrous cesium titanate Cs2Ti5O11

L. A. Bursill, David Smith, Jadwiga Kwiatkowska

    Research output: Contribution to journalArticlepeer-review

    9 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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