Crystal Chemistry of Titanates and Zirconates of Rare Earths—Possible Matrices for Actinide Isolation
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Published:2022-12
Issue:6
Volume:64
Page:667-679
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ISSN:1066-3622
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Container-title:Radiochemistry
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language:en
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Short-container-title:Radiochemistry
Author:
Yudintsev S. V.,Nickolsky M. S.,Stefanovskaya O. I.,Nikonov B. S.
Abstract
Abstract
Titanates and zirconates of light rare earth elements (REE): REE2TiO5, REE2Ti2O7, REE4Ti9O24, and REE2Zr2O7, are of interest as matrices for isolating the REE actinide fraction of high-level waste from the reprocessing of irradiated nuclear fuel. Data on the incorporation of impurities (Zr, U, Ca) into Nd and La titanates are examined. They display limited isomorphism toward these elements, including by the reaction 2REE3+ ↔ Ca2+ + U4+, which is common for minerals and their synthetic analogues. The reasons for the low solubility of Zr and U in Nd titanates and the role of the crystal chemical factor in the choice of crystalline matrices for the immobilization of the REE actinide fraction are considered.
Publisher
Pleiades Publishing Ltd
Subject
Physical and Theoretical Chemistry
Reference83 articles.
1. Adamov, E.O., Lopatkin, A.V., Murav’ev, E.V., Rachkov, V.I., Khomyakov, Yu.S., Izv. RAN. Energetika, 2019, no. 1, p. 3. 2. Adamov, E.O., Mochalov, Yu.S., Rachkov, V.I., Khomyakov, Yu.S., Shadrin, A.Yu., Kascheev, V.A., and Khaperskaya, A.V., At. Energy, 2021, vol. 130, no. 1, p. 29. 3. Spent Nuclear Fuel Reprocessing Flowsheet, Paris: OECD NEA, 2012. 4. Implications of Partitioning and Transmutation in Radioactive Waste Management, Vienna: IAEA, 2004. 5. Ivanov, V.K., Chekin, S.Yu., Menyailo, A.N., Maksyutov, M.A., Tumanov, K.A., Kashcheeva, P.V., Lovachev, S.S., Spirin, E.V., and Solomatin, V.M., Radiatsiya i risk, 2019, vol. 28, no. 2, p. 8.
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