| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1565138 | Journal of Nuclear Materials | 2014 | 5 Pages |
Abstract
The incorporation of uranium into gadolinium zirconate (Gd2Zr2O7) is investigated by synchrotron X-ray powder diffraction and X-ray absorption near-edge structure (XANES) spectroscopy. The results suggest that the uranium cation is largely located on the pyrochlore B-site instead of the targeted A-site. Cation disorder in Gd2Zr2O7 and U-doped Gd2Zr2O7 is investigated by positron annihilation lifetime spectroscopy (PALS) which demonstrates the absence of cation vacancies in these systems. This work provides direct evidence for cation antisite (A- and B-site mixing) disorder in U-doped and off-stoichiometric Gd2Zr2O7 pyrochlore.
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Authors
Daniel J. Gregg, Zhaoming Zhang, Gordon J. Thorogood, Brendan J. Kennedy, Justin A. Kimpton, Grant J. Griffiths, Paul R. Guagliardo, Gregory R. Lumpkin, Eric R. Vance,