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Nonvibrational Nondiffusional Modes of Motion in Hydrated Calcium Nitrate Melts

  • Ian M. Hodge
  • C. Austen Angell

Abstract

Interest in highly concentrated aqueous solutions, in which all or most of the water is directly bound to ions, is relatively recent and has focused to a large extent on hydration coordination numbers and the extent to which cation-bound hydration water molecules are replaced by anions. For example, infrared and Raman spectroscopy of nitrate vibrations in nitrate melts1,2 have provided evidence that the nitrate ion competes effectively with water for the first coordination shell of Ca2+ in Ca(NO3)2 3 solutions and their mixtures with KNO3.4 From the relative intensities of vibrational absorptions due to cation-perturbed and -unperturbed anion normal modes, equilibrium constants can be estimated for water-anion exchange.

Keywords

Dielectric Relaxation High Water Content Glassy State Calcium Nitrate Coordination Shell 
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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Copyright information

© Springer Science+Business Media New York 1981

Authors and Affiliations

  • Ian M. Hodge
    • 1
  • C. Austen Angell
    • 1
  1. 1.Department of ChemistryPurdue UniversityWest LafayetteUSA

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