Study on local structure around Ce and Gd atoms in CeO2-Gd2O3 binary system.
X-ray absorption spectra near Ce and Gd K-edges of binary oxide of Ce(x)Gd(1-x)O(3+x)/2 (0 < or = x < or = 0.5) in C-type structure solid solution were measured by use of the beamline BL01B1 at SPring-8. Interatomic distances between rare-earth and oxygen atoms. R(Gd-O) and R(Ce-O), were evaluated with the extended x-ray absorption fine structure analysis and found to increase with x. R(Gd-O) was larger than R(Ce-O) by about 0.1 A. Metal-oxygen distances estimated as their linear combinations, xR(Ce-O) + (1-x)R(Gd-O), well agreed with those determined by X-ray diffraction.
Nakagawa
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T
Department of Nuclear Engineering, Graduate School of Engineering, Osaka University, Suita, Japan.
Osuki
T
T
Yamamoto
T A
TA
Kitauji
Y
Y
Kano
M
M
Katsura
M
M
Emura
S
S