Mason, A., Thornber, S., Stennett, M. orcid.org/0000-0002-8363-9103 et al. (3 more authors) (2019) Preliminary investigation of chlorine speciation in zirconolite glass-ceramics for plutonium residues by analysis of Cl K-edge XANES. In: MRS Advances. 43rd Symposium on the Scientific Basis for Nuclear Waste Management, 21-24 Oct 2019, Vienna, Austria. Cambridge University Press (CUP) .
Abstract
A zirconolite glass-ceramic material is a candidate wasteform for immobilisation of chlorine contaminated plutonium residues, in which plutonium and chlorine are partitioned to the zirconolite and aluminosilicate glass phase, respectively. A preliminary investigation of chlorine speciation was undertaken by analysis of Cl K-edge X-ray Absorption Near Edge Spectroscopy (XANES), to understand the incorporation mechanism. Cl was found to be speciated as the Cl- anion within the glass phase, according to the characteristic chemical shift of the X-ray absorption edge. By comparison with Cl K-edge XANES data acquired from reference compounds, the local environment of the Cl- anion is most closely approximated by the mineral marialite, in which Cl is co-ordinate to 4 x Na and/or Ca atoms.
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Copyright, Publisher and Additional Information: | © 2019 Materials Research Society. This is an author-produced version of a paper subsequently published in MRS Advances. Uploaded in accordance with the publisher's self-archiving policy. | ||||
Keywords: | actinide; glass; ceramic | ||||
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Institution: | The University of Sheffield | ||||
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) | ||||
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Depositing User: | Symplectic Sheffield | ||||
Date Deposited: | 17 Dec 2019 11:32 | ||||
Last Modified: | 09 Dec 2020 01:38 | ||||
Status: | Published online | ||||
Publisher: | Cambridge University Press (CUP) | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1557/adv.2019.460 |