Iron oxidation dynamics vs. temperature of synthetic potassic-ferro-richterite: a XANES investigation.We investigated the oxidation behaviour of a synthetic potassic-ferro-richterite up to 750 °C by using simultaneous X-ray absorption spectroscopy and X-ray diffraction experiments with synchrotron radiation.  From the analysis of the XANES spectra at the iron K-edge, we observed that the structural shrinkage is due to the iron oxidation process, coupled to hydrogen loss, occurring at ∼315 °C, slightly before the cell contraction. 
XANES
Iron oxidation dynamics vs. temperature of synthetic potassic-ferro-richterite: a XANES investigation.We investigated the oxidation behaviour of a synthetic potassic-ferro-richterite up to 750 °C by using simultaneous X-ray absorption spectroscopy and X-ray diffraction experiments with synchrotron radiation. 
synchrotron radiation