Abstract：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.
Key words：PbWO4 crystal;Vibrational mode;High temperature Raman spectrum;Melt
周凤羽，尤静林*，王媛媛，王 威 . 钨酸铅晶体及其熔体结构的高温拉曼光谱研究[J]. 光谱学与光谱分析, 2010, 30(06): 1507-1510.
ZHOU Feng-yu, YOU Jing-lin*, WANG Yuan-yuan, WANG Wei . High Temperature Raman Spectra and Structure Study of Stolzite-Structured PbWO4 Crystals and Its Melt . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(06): 1507-1510.
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