Hostname: page-component-54dcc4c588-scsgl Total loading time: 0 Render date: 2025-10-09T04:14:59.864Z Has data issue: false hasContentIssue false
  • English
  • Français

The Incorporation of Cerium in Zirconolite

Published online by Cambridge University Press:  03 September 2012

B. D. Begg  and
E. R. Vance
B. D. Begg
Affiliation:
Materials Division, ANSTO, PMB 1, Menai, NSW, 2234, Australia, email b.begg@ansto.gov.au
E. R. Vance
Affiliation:
Materials Division, ANSTO, PMB 1, Menai, NSW, 2234, Australia, email b.begg@ansto.gov.au
Get access

Abstract

Zirconolite (CaZrTi2O7) is the primaryactinide-bearing Synroc phase for the immobilisation of high-level nuclearwaste. Using X-ray absorption spectroscopy and microanalysis we haveinvestigated the incorporation of cerium, as a simulant for plutonium, onboth zirconolite's Ca and Zr sites under a range of redox conditions. The Cevalence state was found to vary between Ce3+ and Ce4+depending on the both the sintering atmosphere and temperature. Theexistence of alternative charge compensation schemes, predominantly cationvacancies, in addition to those used in the sample design was inferred inmany of the zirconolites and will be discussed in detail.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 465: Symposium II – Scienfific Basis for Nuclear Waste Management XX , 1996 , 333
Copyright
Copyright © Materials Research Society 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

REFERENCES

1. Ringwood, A.E., Kesson, S.E., Ware, N.G., Hibberson, W. and Major, A., Nature 278 219 (1979).10.1038/278219a0Google Scholar
2. Vance, E.R., Ball, C.J., Blackford, M.G., Cassidy, D.J. and Smith, K.L., J. Nucl. Mater. 175 55 (1990).10.1016/0022-3115(90)90270-WGoogle Scholar
3. Vance, E.R., Day, R.A., Zhang, Z., Begg, B.D., Ball, C.J. and Blackford, M.G., J. Solid State Chem. 124 77 (1996).10.1006/jssc.1996.0210Google Scholar
4. Begg, B.D. to be published (J. Nucl. Mater).Google Scholar
5. Vance, E.R., Begg, B.D., Day, R.A. and Ball, C.J., in Scientific Basis for Nuclear Waste Management XVIII, edited by Murakami, T. and Ewing, R.C. (Mater. Res. Soc. Proc, Pittsburgh, PA, 1995), pp. 767–74.Google Scholar
6. Coelho, A.A., Cheary, R.W. and Smith, K.L., (submitted to J. Solid. State Chem.)Google Scholar