X-ray absorption spectroscopy was used in order to check the presence of Fe 3+ ions in rs-Fe 1-x Zn x O solid solutions. Bulk samples were crashed into fine powders and then were embedded in cellulose matrix and pressed into pellets with 1-mm thickness. The Fe concentration was adjusted to yield extinction of μd = 2.5. The iron K-edge extended X-ray absorption fine structure (EXAFS) measurements have been performed at beamline A1 (DORIS III, HASYLAB-DESY) with Si (111) 4-crystal monochromator. The EXAFS spectra were measured at room temperature in the fluorescence-detection mode using PIPS (Passivated Implanted Planar Silicon) detector. The energy scale was calibrated by standard 5-mkm foil of ultra-pure Fe (first inflection point at 7111.08 eV).