以Ｎａ２ＷＯ４为助熔剂，采用缓冷法成功地生长出新型发光晶体Ｎａ５Ｔｍ（ＷＯ４）４，晶粒尺寸为２ｍｍ×２ｍｍ×２ｍｍ。根据四方晶系面间距公式及最小二乘法，可以确定晶体的晶胞参数ａ＝１．１３８６ｎｍ，ｃ＝１．１２８３ｎｍ，测定并分析了该晶体室温下的红外光谱、吸收光谱、发射光谱及激发光谱。根据Ｊｕｄｄ－Ｏｆｅｌｔ理论计算了Ｔｍ３＋离子的吸收振子强度和配位场作用强度参数。结果表明该晶体有可能成为一类很重要的蓝色发光材料。 A novel luminescent crystal, Na5Tm (WO4) 4, was successfully grown by slow cooling with Na2WO4 as flux, with a grain size of 2mm × 2mm × 2mm. According to the tetragonal spacing formula and the least square method, the crystal cell parameters a = 1.1386nm and c = 1.1283nm can be determined. The infrared, absorption, emission spectra and excitation spectrum. According to the Judd-Ofelt theory, the absorption oscillator strength and the coordination field strength parameter of Tm3 + ions are calculated. The results show that the crystal may become a very important class of blue luminescent materials.