Polycrystalline powders of title compound were prepared by solid state reaction at lower temperature. The exitation and emmission spectra of the system were recorded and discussed. The results showed that there occurs an energy transfer from Gd 3+ to Eu 3+ . The luminescence intensity of Eu 3+ was found increased with increasing of Gd 3+ concentration. However, Sm 3+ had a quenching influence on the luminescence of Eu 3+ . The exitation and emmission spectra of the system were recorded and discussed. The results showed that there an an energy transfer from Gd 3+ to Eu 3+. The luminescence intensity of However, Sm 3+ had a quenching influence on the luminescence of Eu 3+.