Infrared and Raman spectra of polycrystalline lithium metasilicate have been recorded. A vibrational assignment in terms of the various symmetry species of the unit cell group, C2v, has been made. A normal coordinate analysis of the unit cell vibrations at the centre of the Brillouin zone (k = 0) was carried out to support the assignment and provide descriptions of the vibrational modes. The results are discussed in the light of previous normal coordinate calculations on the isolated metasilicate chain.
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Devarajan et al. (1977) studied this question.