A model for the lattice dynamics of metals propounded by us earlier is applied to copper, a representative of facehyphen;centered cubic metals. The force constants appearing in the secular equation for the lattice frequencies are estimated from the knowledge of the elastic constants. The phonon dispersion curves for the three symmetry directions 100, 110, and 111 are presented and are found to be in fair agreement with the neutron spectroscopic measurements. The frequency distribution function has been calculated. The specific heat computed from the frequency distribution function is found to be in good agreement with the experimental measurements.
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