• Raman spectrum of strontianite (SrCO3)

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/seca/044/02/0096-0098

    • Keywords

       

      Raman Spectrum; Frequency Shift; Aragonite; Lattice Oscillation; SrCO3

    • Abstract

       

      The Raman spectrum of strontianite (SrCO3) has been studied for the first time using the λ 2537 resonance radiation of mercury as the exciter. The observed spectrum has been compared with that of aragonite which is isomorphous with strontianite. Out of the 13 frequency shifts recorded, 5 have been attributed to the internal oscillations of the CO3 ion and the remaining 8 to the lattice oscillations. The splitting of the degenerate v4 vibration of the free CO3 ion in the crystal into 3 frequencies and also the observed relative intensity of the lines 150 cm.-1 and 184 cm.-1 arising from the angular oscillations of the CO3 ions about their principal axes of inertia, indicate a considerable distortion in the symmetry of the CO3 ion in strontianite as in the case of aragonite.

    • Author Affiliations

       

      T S Krishnan1

      1. Department of Physics, Indian Institute of Science, Bangalore 3
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