Hydrothermal reactions of zeolites loaded with cesium or s trontium

Hitoshi Mimura, Masahiro Shibata, Kenichi Akiba

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17 Citations (Scopus)


Cesium-loaded zeolites of low Si/Al atomic ratios such as CsA, CsX and CsY were converted to pollucite ((Cs, Na) A1Si2O6) by hydrothermal treatment above 243°C, but Cs-mordenite of a high Si/Al ratio yielded no structural change owing to its high thermal stability. The structural degradation of zeolite and recrystallization to other minerals much depended on the treating temperature and time; CsA was completely converted into pollucite at 300°C for 2 h and at 243°C for 24 h. The hydrothermal treatment of zeolites A and X partially replaced Na with Cs resulted in the formation of solid solutions occluding pollucite in analcime (NaAlSi2O6·H2O). As for Sr-loaded zeolites, Sr-feldspar (SrA12Si2O8) crystallized from SrA or SrX under mild conditions (150°C, 1 d) compared with those for Cs-loaded zeolites.

Original languageEnglish
Pages (from-to)167-173
Number of pages7
Journaljournal of nuclear science and technology
Issue number2
Publication statusPublished - 1990 Feb


  • Analcime
  • Cesium
  • Hydrothermal treatment
  • Pollucite
  • Recrystallization
  • Solid solutions
  • Sr-feldspar
  • Strontium
  • Temperature dependence
  • Time dependence
  • Zeolites

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering


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