Nakagawa T, Osuki T, Yamamoto T A, Kitauji Y, Kano M, Katsura M, Emura S
Department of Nuclear Engineering, Graduate School of Engineering, Osaka University, Suita, Japan.
J Synchrotron Radiat. 2001 Mar 1;8(Pt 2):740-2. doi: 10.1107/s0909049500018148.
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.
利用日本理化研究所（RIKEN）的SPring-8同步辐射装置的BL01B1光束线，测量了C型结构固溶体Ce(x)Gd(1-x)O(3+x)/2（0≤x≤0.5）二元氧化物在Ce和Gd K边附近的X射线吸收光谱。通过扩展X射线吸收精细结构分析评估了稀土原子与氧原子之间的原子间距离R(Gd-O)和R(Ce-O)，发现它们随x的增加而增大。R(Gd-O)比R(Ce-O)大约大0.1 Å。通过线性组合xR(Ce-O) + (1-x)R(Gd-O)估算的金属-氧距离与X射线衍射测定的结果吻合良好。
