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Raman spectra of crystalline sulphates of zinc, magnesium and sodium

  • C. Shantakumari
Article
  • 148 Downloads

Summary

The Raman spectra of single crystals of the sulphates of zinc, magnesium, magnesium-ammonium and sodium (both thenardite and Glauber’s salt) have been investigated using the λ 2537 resonance radiation of mercury as exciter. The important results obtained may be summarised as follows:—

The Raman spectra of thenardite, the anhydrous sodium sulphate and of magnesium-ammonium sulphate have been recorded for the first time. In the case of the sulphates of zinc, magnesium and sodium (Glauber’s salt) the recorded spectra indicate the existence of 23, 24 and 20 frequency shifts of which 16, 11 and 17 respectively are newly reported. The low frequency spectrum in each case has the following shifts:—
  1. (a)

    Zinc: 56, 70, 104, 128, 151, 212, 252 and 373 cm.−1;

     
  2. (b)

    Magnesium: 56, 75, 97, 118, 150, 252 and 303 cm.−1;

     
  3. (c)

    Magnesium-ammonium: 54, 89, 130, 147, 198, 220 and 265 cm.−1;

     
  4. (d)

    Thenardite: 52, 76, 122 and 164 cm.−1; and

     
  5. (e)

    Glauber’s salt: 53, 134, 158, 231 and 292 cm.−1 The Raman lines of the hydrated sulphate are found to be more diffuse than the corresponding lines of the anhydrous sulphate. The results obtained have been discussed in the light of the known structures of these crystals.

     

Keywords

Raman Spectrum Frequency Shift Raman Line Magnesium Sulphate Zinc Sulphate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Bouhet and LafontJourn. Chem. Phys., 1949,46, 66.Google Scholar
  2. KrishnamurthyNature, 1930,126, 169.CrossRefGoogle Scholar
  3. Ind. Journ. Phys., 1930,5, 183.Google Scholar
  4. Ibid.,, 1930,5, 633.Google Scholar
  5. Lakshmana RaoProc. Ind. Acad. Sci., 1941,14 A, 48.Google Scholar
  6. Nayar, P. G. N.Ibid., 1938,8, 419.Google Scholar
  7. Nisi, H.Jap. J. Physics., 1931,7, 1.Google Scholar

Copyright information

© Indian Academy of Sciences 1953

Authors and Affiliations

  • C. Shantakumari
    • 1
  1. 1.Department of PhysicsIndian Institute of ScienceBangalore-3

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