Lattice vibration spectra and thermal properties of SrWO4 single crystal

Large size strontium tungstate (SrWO4) single crystal was grown by Czochralski method. Raman scattering and infrared absorbance spectra measurements show that the characteristic lattice vibrational modes of SrWO4 arise mainly from the internal vibrations of the WO4 tetrahedra and partly by the external SrO8 polyhedra modes. Thermal properties including thermal expansion, specific heat, thermal diffusion and conductivities of the crystal were investigated to evaluate the thermal properties of SrWO4. The anisotropy of thermal properties was explained by crystal structure and its correlation with the lattice vibration spectra. (c) 2006 Elsevier B.V. All rights reserved.