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X-ray absorption spectra in pyrochlore niobates

Torigoe, Shuhei*; Ishimoto, Yutaro*; Hanasaki, Noriaki*; Nogami, Yoshio*; Matsumura, Daiju   ; Yoshii, Kenji  ; Yoneda, Yasuhiro   ; Nishihata, Yasuo

The X-ray absorption spectra of some pyrochlore niobates reveal the valence of the Nb ion in each material, and the displacement of the Nb ions from the center of the oxygen octahedra in the pyrochlore niobates YCaNb$$_{2}$$O$$_{7}$$ and NdCaNb$$_{2}$$O$$_{7}$$, which is consistent with the previous report of the neutron diffraction.



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