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Figure 2
Uranium L3-edge HERFD-XAS and the corresponding simulated spectrum using FDMNES for NaUO3, KUO3 and RbUO3. The calculated spectra account for both dipolar and quadrupolar transitions (see the supporting information for comparison of simulated spectra with and without the quadrupolar transition). The Fermi energy level is indicated with a vertical dotted line. Vertical dashed–dotted lines indicate the positions of features A, A[^{\star}], B and C, as experimentally observed in KUO3, to guide the eye. Blue arrows highlight the crystal-field splitted U-d orbitals (t2g and eg), while black arrows indicate the positions of the post-edge observed features.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 32| Part 5| September 2025| Pages 1257-1264
https://doi.org/10.1107/S1600577525005156
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