
TY  - JOUR
A1  - Lloyd, P 
T1  - Anharmonic Contributions to the Vibratory Free Energy of a Lattice
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1964
VL  - 17
IS  - 3
SP  - 269
EP  - 281
KW  - 
UR  - https://doi.org/10.1071/PH640269 
N2  - The anharmonic contribution to the free energy of a lattice is evaluated by means of a Bethe approximation. The approximation is accurate to within 3% for the model valuated by Maradudin, Flinn, and Coldwell· Horsfall. The anharmonic contribution to the specific heat at constant volume of a model of sodium is evaluated.The specific heat is found to increase as the temperature rises but the rate of increase is lower than the observed value 
ER  -

