Alteration of CsAlSiO4 in hydrothermal fluids

Sridhar Komarneni, William B. White

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


CsAlSiO4, one of the hosts for the immobilization of Cs from nuclear wastes, altered extensively in solutions of low and high cationic activity under mild hydrothermal conditions which may be expected in a radwaste repository. For example, the CsAlSi04 phase changed to pollucite and chlorite in deionized water and 3 n MgCl2 brine, respectively, releasing 1.3% to 98.6% of its Cs into solution at temperatures of 100-300 °C for 4 weeks under a confining pressure of 300 bar. These and earlier results indicate that under radwaste repository conditions pollucite is a stable phase but not the CsAlSiO4 phase and, therefore, CsAlSiO4 is not a good host for the immobilization of Cs from nuclear wastes.

Original languageEnglish (US)
Pages (from-to)169-172
Number of pages4
JournalNuclear and Chemical Waste Management
Issue number3
StatePublished - 1982

All Science Journal Classification (ASJC) codes

  • Waste Management and Disposal
  • General Environmental Science
  • Pollution
  • General Earth and Planetary Sciences


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