Hi Disha,

  The shift in bond distance in this case, is not necessarily associated with the change of oxidation state. It can be simply caused by the insertion/removal of Li/Na or whatever depending on your battery type during the charge/discharge, which sometimes changes the oxidation state of Mn slightly, sometimes doesn't. 

  Regards,

On Sun, Jun 10, 2018 at 11:34 PM, Disha Gupta <dsha.91@gmail.com> wrote:
Dear All 

Firstly, I would like to say sorry if I have missed out on this discussion before but it would be great if you could help me out. 
I have been analyzing some Mn K-edge XAS data for some battery materials. While the XANES data shows no shift in the main absorption peak which means that there is no oxidation change happening, however, when I am fitting the data in Artemis, I can see a shift in the bond lengths suggesting an oxidation change. Is it possible that bond lengths change even though XANES spectra show no change? 


Thank you and Kind Regards
Disha 

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