Аннотация:The optical absorption and electron paramagnetic resonance (EPR) spectra were investigated in Czochralski grown Y2SiO5 single crystal doped by 53Cr isotope. For the first time, EPR signals of Cr3+ ions localized in two physically non-equivalent yttrium positions were detected in this crystal. The parameters of the fine and hyperfine structures of the observed centers have been determined.