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Photoluminescence (PL) spectra measurements have been carried out in the ternary chalcopyrite semiconductor compounds ZnGa 2 Se 4 and ZnGa 2 Se 4 :Eu 2+ using single-wavelength excitation of a Hg lamp with  = 365 and 375 nm.Measurements were performed at the temperature range of (120 -220 K) and (110 - ), energy of optical phonons (h = 25 -30 meV), Huan Rice parameter (S = 8 -10), energy of thermal quenching (E = 0.02 -0.06 eV) were determined from the temperature dependences of the full width at half maximum (FWHM = Г(T)).