The microscopic physical properties of nonstoichiometric garnet Eu_xFe_2-xO₃ (x=0.8 and 0.7) have been studied by the methods of X-ray diffraction at room temperature and Mössbauer spectroscopy within the temeperature range of 12-560 K. The X-ray diffraction patterns of the samples show coexistence of dominant garnet and a small portion of unknown crystal phase. But the Mössbauer spectra for the sample of EF08 and EF07 near Néel temperature determined to be equally 549±5K show that there are no any other extra crystal phases within the experimental error. The results of which the temperature dependence of M ssbauer parameters was anlyzed by the spin-wave theory and Debye model are in good agreement with the fact that the sample of EF08 has some vacancies at a-and/or d-sites.