However, the extent of peak broadening is so significant that more detailed structural refinement, e.g. a complete analysis of stacking faults, results in overfitting of the data. Next, the Mn K-edge XAS of the TM (oxy)hydroxide precursor shown in Figure (along with several reference compounds) indicates an oxidation state of Mn 3.5+ . Because Ni remains divalent, the average TM oxidation state in the precursor is 3+, consistent with an oxyhydroxide.