Abstract
The phonon dispersion curves, frequency spectrum and specifie heat of potassium have been calculated on the basis of the lattice dynamical model of Sharma and Joshi. The frequency spectrum of potassium has been computed by the numerical sampling of 192 000 frequencies corresponding to 64 000 points considered in the first Brillouin zone. The computed frequency distribution has been used for the calculation of the lattice specific heat of potassium. The theoretically calculated values of the specific heats have been compared with the experimental data in terms of the Debye characteristic temperatures. The theoretical results are in reasonable agreement with the experimental data.
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