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Ceramics Based on the NaRe2(PO4)3 Phosphate with the Kosnarite Structure as Waste Forms for Technetium Immobilization

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Abstract—

Ceramics based on the NaRe2(PO4)3 phosphate with the structure of the mineral kosnarite have been prepared by spark plasma sintering. Rhenium (Re) has been used as a chemical and structural analog of technetium. The relative density of the ceramics is 85%. We have studied the mechanism of Re leaching from the NaRe2(PO4)3 ceramics in static mode at room temperature. The rhenium leaching rate has been determined to be 1.3 × 10–5 g/(cm2 day).

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Funding

This work was supported by the Tekhnoplatforma 2035 Science and Education Center, Nizhny Novgorod oblast (agreement no. 16-11-2021/49, November 16, 2021; supervisory board meeting minutes no. Sl-001-685415/21, October 25, 2021) and through the agreement 217/4571-D between Lobachevsky State University and Khlopin Radium Institute (Demonstration of Radiation Resistance of Waste Forms. Demonstration of Radiation Resistance of Waste Forms for Short-Lived Fractions. Technology Test Maintenance).

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Authors and Affiliations

  1. Lobachevsky State University, 603022, Nizhny Novgorod, Russia

    L. S. Alekseeva, A. V. Nokhrin, A. I. Orlova, M. S. Boldin, E. A. Lantsev, A. A. Murashov & V. N. Chuvil’deev

  2. Khlopin Radium Institute, 194021, St. Petersburg, Russia

    K. K. Korchenkin & D. V. Ryabkov

Authors
  1. L. S. Alekseeva
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  2. A. V. Nokhrin
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  3. A. I. Orlova
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  4. M. S. Boldin
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  5. E. A. Lantsev
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  6. A. A. Murashov
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  7. K. K. Korchenkin
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  8. D. V. Ryabkov
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  9. V. N. Chuvil’deev
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Correspondence to L. S. Alekseeva.

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Translated by O. Tsarev

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Alekseeva, L.S., Nokhrin, A.V., Orlova, A.I. et al. Ceramics Based on the NaRe2(PO4)3 Phosphate with the Kosnarite Structure as Waste Forms for Technetium Immobilization. Inorg Mater 58, 325–332 (2022). https://doi.org/10.1134/S0020168522030013

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