A Potential Wasteform for Cs Immobilization: Synthesis, Structure Determination, and Aqueous Durability of Cs2TiNb6O18
- Submitting institution
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The University of Sheffield
- Unit of assessment
- 12 - Engineering
- Output identifier
- 2714
- Type
- D - Journal article
- DOI
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10.1021/acs.inorgchem.6b01826
- Title of journal
- Inorganic Chemistry
- Article number
- -
- First page
- 12686
- Volume
- 55
- Issue
- 24
- ISSN
- 0020-1669
- Open access status
- Compliant
- Month of publication
- November
- Year of publication
- 2016
- URL
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- Supplementary information
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- Request cross-referral to
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- Output has been delayed by COVID-19
- No
- COVID-19 affected output statement
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- Forensic science
- No
- Criminology
- No
- Interdisciplinary
- No
- Number of additional authors
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3
- Research group(s)
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- Proposed double-weighted
- No
- Reserve for an output with double weighting
- No
- Additional information
- A new titanate-niobate pyrochlore matrix, Cs2TiNb6O18, was synthesised for the immobilisation and disposal of radioactive cesium isotopes. Crystal structure refinement established the Cs ion to be encapsulated by the highly insoluble polyhedral network of the pyrochlore structure, with no effective diffusion pathway. Consequently, this material shows exceptionally low Cs dissolution rates, importantly outperforming the commercial Synroc family of materials. This research delivers a new approach for the treatment of commercial high dose spent adsorbents on the Fukushima Dai-ici site, which can be thermally treated to yield a Cs2TiNb6O18 glass-ceramic (doi.org/10.1016/j.jnucmat.2017.10.011).
- Author contribution statement
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- Non-English
- No
- English abstract
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