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Correlation effects in metal ammonia systems

  • Juana V. Acrivos
  • A. S. Robertson
  • M. P. Klein
I. Ionic Liquids and Molten Salts
Part of the Lecture Notes in Physics book series (LNP, volume 172)

Abstract

The recent structural and electrochemical measurements of the alkali metal-ammonia systems are reconciled in a model where the correlation energy leads to the formation of bound states. This is evident in the X-ray absorption of Rbx(NH3)1−x near the Rb K-edge as a white peak which appears only when the metal mole fraction is reduced below xc = 0.04. These transitions must be associated with the correlation effects which lead to the formation of sodium anions predicted by electrochemical measurements. If the anions act as impurity centers with a minus two valence change from the uniformly charged positive background, Friedel oscillations in the electron density must be taken into account in a statistical description of the system. The deviations of the activity coefficients from the usual Debye-Hückel expression are discussed.

Keywords

Charge Density Wave Spin Density Wave Excess Free Energy Knight Shift Boltzmann Statistic 
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-Verlag 1982

Authors and Affiliations

  • Juana V. Acrivos
    • 1
  • A. S. Robertson
    • 2
  • M. P. Klein
    • 2
  1. 1.San Jose State University
  2. 2.Lawrence Berkeley LaboratoryU.C.B.CA

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