The frequency distribution functions of copper and lithium have been calculated by sampling method from 7770 points distributed in the Debye sphere, using the anisotropic dispersive continuum model. The specific heats are calculated by numerical integration. The calculated equivalent Debye temperatures are compared with the experimental data and the results are discussed.

• Received 3 June 1963

DOI:https://doi.org/10.1103/PhysRev.132.559