TY  - JOUR
UR  - http://stacks.iop.org/1742-6596/712/i=1/a=012092
T1  - Probing Covalency in the UO 3 Polymorphs by U M 4 edge HR- XANES
A1  - Y Podkovyrina and I Pidchenko and T Prüßmann and S Bahl and J. Göttlicher and A Soldatov and T Vitova
Y1  - 2016
SP  - 012092
JF  - Journal of Physics: Conference Series
VL  - 712
IS  - 1
SN  - 1742-6596
N2  - Local atomic and electronic structure investigations of uranium trioxide (UO 3 ) crystalline phases
performed by the U M 4 edge HR-XANES technique is presented. The experimental U M 4 edge HR-XANES
spectra of α-UO 3 , β-UO 3 and γ-UO 3 polymorphic phases are compared with spectra of uranate (CaU 2
O 7 ) and uranyl (UO 3 •1-2(H 2 O)) compounds. We describe a finger print approach valuable for
characterization of variations of U-O axial bond lengths. Theoretical calculations of spectra using
full-multiple-scattering theory (FEFF9.6 code) are performed. We have tested and selected input
parameters, which provide best agreement between experimental and calculated spectra.
ER  -