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. 2017 Sep 1;4(5):054307. doi: 10.1063/1.4986627

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© 2017 Author(s).

2329-7778/2017/4(5)/054307/16

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FIG. 5. — Mn L₃-edge peak-maximum positions of the spectra shown in Fig. 4 versus formal oxidation states of Mn in the inorganic compounds (the same color code as for the spectra in Fig. 4). The error bars reflect step sizes of ±1 of the monochromator scan. For comparison, the peak-maximum positions of the Mn L₃-edge spectra for PS II in the S₁ (dark) state and the 2 F (illuminated) sample are shown in the expected average oxidation states (error bars of one bin width). Note that the Mn(II)Mn(III)₂CaO(OH) (non-cubane, reduced) Mn₃CaO_x complex and the PS II samples exhibit mixed oxidation states (see main text), but only for the Mn₃CaO_x complex with two clearly separable Mn L₃ peaks (see Fig. 4), two peak-maximum positions are given. The gray shaded area reflects the uncertainty of the linear fit.