We discuss the synthesis of Na2W2O7 polycrystalline materials based on the TG-DSC experiment.The luminescence properties of the Na2W2O7 crystal are investigated using the Nd:YAG laser as the excitation source.It is found that the maximum emission peak of the Na2W2O7 crystal is at 525 nm.The 525-nm luminescence decay has two components.One has decay time 1.8μs and the other 49.1 μs.By comparing this results with that of the Na2W4O13 crystal,it is assumed that the 525-nm luminescence emission of the Na2W2O7 crystal originates from the WO6-6 octahedral group.The Na2W2O7 crystal is a possible scintillator.It has relatively high light output under the x-ray excitation.[1] Compared with the halide scintillation crystals,the Na2W2O7 crystal has stable chemicalphysical properties.The anion group of the Na2W2O7crystal is W2O72-,which is different from the traditional tungstate crystals such as the PbWO4,ZnWO4,CaWO4 and CdWO4.[2-5] Those widely used traditional tungstate scintillation crystals are the intrinsic scintillation crystals.The luminescence center is the WO2-4 anion group.This is one of the advantages of those traditional tungstate scintillation crystals commonly.For the Na2W2O7 crystal,the luminescence center and the scintillation mechanism are still unknown.