Abstract
Phonon frequencies, thermal expansion coefficient and Grüneisen parameters are calculated from the dispersion relation derived by Toya for bcc lithium. Improved correlation term derived by Sham on the basis of Thomas-Fermi approach has been incorporated. The phonon frequencies are in good qualitative agreement with the experiment. Lattice specific heats, thermal expansion coefficient and γ M -the mean value of Grüneisen parameters at different temperatures have been calculated by this method and are presented in this paper. The results obtained show that the correlation term is an essential feature of realistic calculations.
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