Journal of Structural Chemistry

, Volume 1, Issue 2, pp 168–172 | Cite as

Vibrational spectra of the water of crystallization in monocrystals of NiSO4 · 7H2O, NiSO4 · 6H2O, CaSO4 · 2H2O near the fundamental of the O-H valence vibration

  • S. N. Andreev
  • S. A. Shchukarev
  • T. G. Balicheva
Article
  • 46 Downloads

Summary

  1. 1.

    The infrared absorption spectra in the region of the fundamental O−H frequency are reported for crystals of NiSO4·7H2O, NiSO4·6H2O, CaSO4·2H2O from 50 to 15μm thick.

     
  2. 2.

    The peaks for NiSO4·6H2O and NiSO4·7H2O are displaced about 300 cm−1 to the long-wave side of the peak for CaSO4·2H2O. The hydrates of NiSO4 gives bands much broader than the band given by gypsum.

     
  3. 3.

    The relation between the O−H frequencies and between the bands widths are explained on the assumption that the energies of the OH2...OSO3 −2 hydrogen bonds depend not only on the H2O... OSO3 −2, distance but also on the Me2+ cation.

     

Keywords

Gypsum NiSO4 Infrared Absorption Spectrum Nickel Sulfate Hydrated Salt 

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Copyright information

© Consultants Bureau Enterprises, Inc. 1960

Authors and Affiliations

  • S. N. Andreev
    • 1
  • S. A. Shchukarev
    • 1
  • T. G. Balicheva
    • 1
  1. 1.A. A. Zhdanov State UniversityLeningrad

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