测量了升温条件下(298～1 473 K)钨铅矿型钨酸铅(PbWO4)晶体及其熔体的拉曼光谱， 确定了各振动模的归属， 其中波数902.7 cm-1的最强拉曼峰为［WO4］四面体的内振动光学模式ν1(Ag)， 属于对称伸缩振动。 同时， 随温度上升， 谱峰展宽并伴随强度减弱， 体系内无序化程度增加。 至1 398 K晶体初步熔化， 并且在1 473 K完全熔融， 高温熔体谱中自由［WO4 ］2-结构单元的内振动模式显现， 同时发生了由晶体固定晶胞的S4型对称性向熔体中［WO4 ］2-结构单元的Td型对称性的结构转化 ， 表明PbWO4的熔体中存在相对孤立的［WO4 ］2-结构单元。

Raman spectra of stolzite-structured PbWO4 crystal were recorded from 298 to 1 473 K. All the appearing vibrational modes were interpreted and assigned. The most intense mode at 902.7 cm-1, which is identified as the internal mode ν1(Ag)of symmetrical stretching attributed to the vibration of ［WO4］2- tetrahedron. Temperature dependent characteristics of the Raman spectra of the crystal were investigated. Band half-widths widened accompanied by the relative intensity decreased, and the lattice became more disorder with the increase in temperature. As being heated up to 1 398 K, PbWO4 crystals began to be melting and have completely transformed to liquid state at 1 473 K, while the internal vibrational modes of isolated ［WO4］2- tetrahedron have appeared and the symmetry of vibrational modes transformed from S4 in crystal into Td of ［WO4］2- in melt. It suggested that the isolated ［WO4］2- structure unit exists in the melt.