  Theoretically predicted linear correlation between the volume coefficient of
thermal expansion and the thermal heat capacity was investigated for highly
symmetrical atomic arrangements. Normalizing the data of these thermodynamic
parameters to the Debye temperature gives practically identical curves from
zero Kelvin to the Debye temperature. This result is consistent with the
predicted linear correlation. At temperatures higher than the Debye temperature
the normalized values of the thermal expansion are always higher than the
normalized value of the heat capacity. The detected correlation has significant
computational advantage since it allows calculating the volume coefficient of
thermal expansion from one experimental data by using the Debye function.
