A-site ordered perovskite CaCu3Cu2Ir2O12−δ with square-planar and octahedral coordinated Cu ions
Zhao Qing1, 2, Yin Yun-Yu2, Dai Jian-Hong2, Shen Xi2, Hu Zhi-Wei3, Yang Jun-Ye2, Wang Qing-Tao1, 4, †, , Yu Ri-Cheng2, Li Xiao-Dong5, Long You-Wen2, 6, ‡,
       

XAS of (a) Cu–L3 edge, (b) Ir–L3 edge of CaCu3Cu2Ir2O12−δ. The XAS spectra of some related references are also shown for comparison.