Hydrothermal Dissolution of Perovskite: Implications for Synroc Formulation

Theodora Kastrissios*, Mark Stephenson, Peter S. Turner, Timothy J. White

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

The results of a transmission electron microscope study of the hydrothermal alteration products formed by perovskite and two titantate‐based “synroc” formulations are reported. It was found that perovskite, the host phase for strontium‐90, dissolved at combined temperatures and pressures greater than 110°C and 180 kPa. Dissolution of perovskite was accompanied by an epitaxial crystallization of the titanium dioxide polymorphs, brookite and anatase. Hollandite, which incorporates cesium‐137, dissolved more slowly than perovskite, with only minor TiO2 crystallization. Intergrowths of zirconolite and zirkelite, the principal actinide‐containing phases, were highly resistant to hydrothermal treatments, maintaining their integrity under all experimental conditions.

Original languageEnglish
Pages (from-to)C‐144-C‐146
JournalJournal of the American Ceramic Society
Volume70
Issue number7
DOIs
Publication statusPublished - Jul 1987
Externally publishedYes

ASJC Scopus Subject Areas

  • Ceramics and Composites
  • Materials Chemistry

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