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values for the samples plotted against the ionic radius , of the constituent.
Representative example of the Cu -edge XANES spectra obtained for the samples (here ) and illustration of the fitting of the spectral features (in the area) into and components.
Average valence of copper, , in the samples as estimated from the Cu -edge XANES spectra and plotted against .
O -edge XANES spectra obtained for the samples (, Er, Ho, Y, Dy, and Gd).
Variation of the relative intensities of the three pre-edge peaks in the O -edge XANES spectra of the samples plotted against : the peak (due to hole states at the apical oxygen site), the peak (due to hole states at the -double-chain and -plane oxygen sites), and the UHB peak (inversely proportional to the -plane hole states).
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