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. 2015 Jun 4;6:7345. doi: 10.1038/ncomms8345

Figure 4. X-ray absorption near-edge structure (XANES) analysis of metal valence.

Figure 4

(a,b) K-edge XANES patterns of Co (a) and Mn (b) in the synthesized spinels and the reference oxides. (c,d), Fitted linear relationship between the photon energy and oxidation state of Co (c) or Mn (d).