Surface alteration of sintered product of cesium aluminum silicate under hydrothermal conditions

Hitoshi Mimura, Kazuki Iijima, Kenichi Akiba, Kazuki Iijima

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A sintered product of cesium aluminum silicate, CsAlSi5O12, formed an outer precipitated layer and a reaction layer when exposed to 3.0 m (= mol/dm3) NaCl under hydrothermal conditions above 250°C to 300°C. The precipitated layer consisted of crystallized phases of analcime and montmorillonite, and the reaction layer exhibited a concentration gradient for Cs. These layers grew with temperature and reaction time. When the solid sample was contacted with NaCl solutions below 0.1M, the crystallized phase of pollucite was formed in the precipitated layer. Successive accumulation of pollucite layer contributed to the depression of leaching of Cs.

Original languageEnglish
Pages (from-to)1145-1152
Number of pages8
Journaljournal of nuclear science and technology
Volume30
Issue number11
DOIs
Publication statusPublished - 1993 Nov

Keywords

  • Analcime
  • Cesium aluminum silicates
  • Concentration dependence
  • Crystallization
  • Crystallized phase
  • Hydrothermal condition
  • Leaching
  • Montmorillonite
  • Pollucite
  • Precipitated layer
  • Reaction layer
  • Sodium chrolide
  • Surface alteration
  • Temperature dependence
  • Time dependence

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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