The incorporation of cerium in zirconolite
No Thumbnail Available
Date
1997
Journal Title
Journal ISSN
Volume Title
Publisher
Materials Research Society
Abstract
Zirconolite (CaZrTi2O7) is the primary actinide-bearing Synroc phase for the immobilisation of high-level nuclear waste. Using X-ray absorption spectroscopy and microanalysis we have investigated the incorporation of cerium, as a simulant for plutonium, on both zirconolite's Ca and Zr sites under a range of redox conditions. The Ce valence state was found to vary between Ce3+ and Ce4+ depending on the both the sintering atmosphere and temperature. The existence of alternative charge compensation schemes, predominantly cation vacancies, in addition to those used in the sample design was inferred in many of the zirconolites and will be discussed in detail. © Materials Research Society 1997
Description
Physical copy held by ANSTO at DDC: 621.4838/31.
Abstract also available online at https://doi.org/10.1557/PROC-465-333.
Keywords
Zirconolite, Cerium, Actinides, Synroc process, High-level radioactive wastes, Sintering, Valence, Atmospheres
Citation
Begg, B. D., & Vance, E. R. (1996). The incorporation of cerium in zirconolite. Paper presented to the Scientific Basis for Nuclear Waste Management XX, 2-6 December 1996, Boston, Massachachuetts, U. S. A. In Gray, W. J. & Triay, I. R. (Eds.), Material Research Society Proceedings, Symposium held 2-6 December, 1996, Boston, Massachusetts, U. S. A., (Vol. 465, pp. 333-340).