Accommodation of uranium into the garnet structure

Sergey V. Yudintsev; Marya I. Lapina; Alexander G. Ptashkin; Tatiana S. Ioudintseva; Satoshi Utsunomiya; Lumin M. Wang; Rodney C. Ewing

doi:10.1557/proc-713-jj11.28

Accommodation of uranium into the garnet structure

Sergey V. Yudintsev, Marya I. Lapina, Alexander G. Ptashkin, Tatiana S. Ioudintseva, Satoshi Utsunomiya, Lumin M. Wang, Rodney C. Ewing

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

One promising host for actinide wastes is garnet-type phases of general formula A^VIII₃B^VI₂[XO₄]₃. To determine the isomorphic capacity of garnet for uranium, CaO - Fe₂O₃ - Al₂O₃ - SiO₂ - ZrO₂ - Gd₂O₃ - UO₂ system was studied. Experiments were performed in air medium at 1400 - 1500°C and 1 atm. The garnets have high capacity for Gd and Zr, while incorporation of U was found to be greatly dependent on the phase composition. Uranium content decreased from 18 wt.% in Ca-Zr-Fe garnet to 0.6 wt.% in Si-doped phases. Heavy ion irradiation (1.0 MeV Kr⁺⁺) experiments were carried out for a garnet with maximal U content, (Ca_2,7U_0,3) ^VIII(Zr_1,7Fe_0,3) ^VI(Al_1,1Fe_1,9)^IV O₁₂. Amorphization dose of the phase was equal to 1.63×10¹⁴ ions/cm² that is close to the other actinide hosts, such as pyrochlore Gd₂Ti₂O₇.

Original language	English
Pages (from-to)	477-480
Number of pages	4
Journal	Materials Research Society Symposium - Proceedings
Volume	713
DOIs	https://doi.org/10.1557/proc-713-jj11.28
Publication status	Published - 2002
Externally published	Yes

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Accommodation of uranium into the garnet structure",

abstract = "One promising host for actinide wastes is garnet-type phases of general formula AVIII3BVI2[XO4]3. To determine the isomorphic capacity of garnet for uranium, CaO - Fe2O3 - Al2O3 - SiO2 - ZrO2 - Gd2O3 - UO2 system was studied. Experiments were performed in air medium at 1400 - 1500°C and 1 atm. The garnets have high capacity for Gd and Zr, while incorporation of U was found to be greatly dependent on the phase composition. Uranium content decreased from 18 wt.% in Ca-Zr-Fe garnet to 0.6 wt.% in Si-doped phases. Heavy ion irradiation (1.0 MeV Kr++) experiments were carried out for a garnet with maximal U content, (Ca2,7U0,3) VIII(Zr1,7Fe0,3) VI(Al1,1Fe1,9)IV O12. Amorphization dose of the phase was equal to 1.63×1014 ions/cm2 that is close to the other actinide hosts, such as pyrochlore Gd2Ti2O7.",

author = "Yudintsev, {Sergey V.} and Lapina, {Marya I.} and Ptashkin, {Alexander G.} and Ioudintseva, {Tatiana S.} and Satoshi Utsunomiya and Wang, {Lumin M.} and Ewing, {Rodney C.}",

year = "2002",

doi = "10.1557/proc-713-jj11.28",

language = "English",

volume = "713",

pages = "477--480",

journal = "Materials Research Society Symposium - Proceedings",

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T1 - Accommodation of uranium into the garnet structure

AU - Yudintsev, Sergey V.

AU - Lapina, Marya I.

AU - Ptashkin, Alexander G.

AU - Ioudintseva, Tatiana S.

AU - Utsunomiya, Satoshi

AU - Wang, Lumin M.

AU - Ewing, Rodney C.

PY - 2002

Y1 - 2002

N2 - One promising host for actinide wastes is garnet-type phases of general formula AVIII3BVI2[XO4]3. To determine the isomorphic capacity of garnet for uranium, CaO - Fe2O3 - Al2O3 - SiO2 - ZrO2 - Gd2O3 - UO2 system was studied. Experiments were performed in air medium at 1400 - 1500°C and 1 atm. The garnets have high capacity for Gd and Zr, while incorporation of U was found to be greatly dependent on the phase composition. Uranium content decreased from 18 wt.% in Ca-Zr-Fe garnet to 0.6 wt.% in Si-doped phases. Heavy ion irradiation (1.0 MeV Kr++) experiments were carried out for a garnet with maximal U content, (Ca2,7U0,3) VIII(Zr1,7Fe0,3) VI(Al1,1Fe1,9)IV O12. Amorphization dose of the phase was equal to 1.63×1014 ions/cm2 that is close to the other actinide hosts, such as pyrochlore Gd2Ti2O7.

AB - One promising host for actinide wastes is garnet-type phases of general formula AVIII3BVI2[XO4]3. To determine the isomorphic capacity of garnet for uranium, CaO - Fe2O3 - Al2O3 - SiO2 - ZrO2 - Gd2O3 - UO2 system was studied. Experiments were performed in air medium at 1400 - 1500°C and 1 atm. The garnets have high capacity for Gd and Zr, while incorporation of U was found to be greatly dependent on the phase composition. Uranium content decreased from 18 wt.% in Ca-Zr-Fe garnet to 0.6 wt.% in Si-doped phases. Heavy ion irradiation (1.0 MeV Kr++) experiments were carried out for a garnet with maximal U content, (Ca2,7U0,3) VIII(Zr1,7Fe0,3) VI(Al1,1Fe1,9)IV O12. Amorphization dose of the phase was equal to 1.63×1014 ions/cm2 that is close to the other actinide hosts, such as pyrochlore Gd2Ti2O7.

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Accommodation of uranium into the garnet structure

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