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, the 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) IVO12. 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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B. Burakov, E. Anderson, et al., Proc. MRS Symp., 556, 55 (1999).
B. Burakov and E. Anderson, AIP Conf. Proc., NY, 532, 159 (2000).
T. Smelova, N. Krylova, S. Yudintsev, Dokl. Rus. Ac. Sci. (Russ.), 374, 242 (2000).
S. Geller, Zeits. fur Kristallogr., 125, 1 (1967).
J. Ito and C. Frondel, Amer. Mineral., 52, 773 (1967).
S. Schneider, R. Roth, J. Waring, J. Res. Natl. Bur. Stand., 65A, 345 (1961).
Galakhov Ya., State diagrams of systems of resistant oxides (Russ.), 384 (1985).
R.D. Shannon, Acta Cryst., 32, 751 (1976).
S. Wang, B. Begg, L. Wang, et al., J. Mater. Res., 14, 4470 (1999).
H. Jaffe, Amer. Mineral., 36, 133 (1951).
V. Karpenko, Problems of Applied Radiogeology (Russ.), 157 (1963).
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Yudintsev, S.V., Lapina, M.I., Ptashkin, A.G. et al. Accommodation of Uranium into the Garnet Structure. MRS Online Proceedings Library 713, 1128 (2001). https://doi.org/10.1557/PROC-713-JJ11.28