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The above figure shows the Ru L-Edge X-ray absorption spectra for two Ru perovskites; one containing Ru 4+ and the other Ru 5+ . Giving


  1. The above figure shows the Ru L-Edge X-ray absorption spectra for two Ru perovskites; one containing Ru4+ and the other Ru5+. Giving your reasoning, explain which trace corresponds to the Ru4+ oxide and which corresponds to the Ru5+ oxide. 
  2. The two spectra show subtle differences in peak shape around 2860 eV. What is the probable cause of this?

Ru L, edge B A 2820 2830 2840 2850 2860 2870 Energy (ev) Normalised Intensty

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