Laser Induced Raman Spectra of Some Tungstates and Molybdates.

Abstract

The Raman spectra of single crystals of CaWO4, CaMoO4, PbWO4, and PbMoO4 have been recorded using a He-Ne laser (λ = 6328 Å) and an Argon ion laser (λ = 4880 Å) as the exciting radiation sources. The polarization data have enabled us to classify unambiguously the observed fundamentals into the Raman active species of the point group C4h to which these crystals belong. The comparison of the spectra of these crystals in the low frequency region has also enabled us to make a rough classification of the bands into the rotational and the translational lattice vibrations.