In situ radiation damage studies of Ca3Zr2FeAlSiO12 and Ca3Hf2FeAlSiO12
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Date
2009-11-25
Journal Title
Journal ISSN
Volume Title
Publisher
Australian Institute of Nuclear Science and Engineering (AINSE)
Abstract
Garnets, A3B2C3O12, are considered to be potential host phases for the immobilization of high-level nuclear waste as they can accommodate a number of elements of interest, including Zr, Ti and Fe. The naturally occurring garnet, kimzeyite, Ca3(ZrTi)2(SiAlFe)O12, can contain ∼30wt% Zr. An understanding of the radiation tolerance of these materials is crucial to their potential use in nuclear waste immobilization. In this study two synthetic analogues of kimzeyite of composition Ca3(ZrTi)2(SiAlFe)O12 and Ca3Hf2FeAlSiO12 were monitored in situ during irradiation with 1.0 MeV Kr ions using the intermediate voltage electron microscope-tandem user facility (IVEM) at Argonne National Laboratory. The structure of these materials was previously determined by neutron diffraction and 57Fe Mössbauer spectroscopy. Ca3(ZrTi)2(SiAlFe)O12 and Ca3Hf2FeAlSiO12 have very similar structural properties with cubic la3d symmetry, the only significant difference being the presence of Zr and Hf, respectively on the 6 coordinated B sites. © 2009 AINSE
Description
This paper is only available in print format. The Conference Proceedings are held by ANSTO Library, DDC number 543.1/11.
Keywords
Radioactive wastes, Irradiation, Garnets, Physical radiation effects, MeV range 01-10, Neutron diffraction, Symmetry, Solidification
Citation
Whittle, K. R., Blackford, M. G., Smith, K. L., Lumpkin, G. R., & Zaluzec, N. J. (2009). In situ radiation damage studies of Ca3Zr2FeAlSiO12 and Ca3Hf2FeAlSiO12. Paper presented at the 16th Conference on Nuclear & Complementary Techniques of Analysis, AINSE, Lucas Heights, 25-27 November 2009.