XAS spectra from the AxNiR crystal following the collection of structures MX2 (solid line) and MX3 (dotted line) using 0.98 Å X-rays. The spectra are consistent with a T2Cu(II) oxidation state in both cases. Inset: comparison of the edge region for oxidized and fully reduced AxNiR crystals. Note that the oxidized crystal has been exposed only to the X-rays used to collect the XAS spectrum. In the reduced spectrum the 8984 eV shoulder arising from T2Cu(I) is apparent.