Lattice dynamics and the SOE constants of thallium at 77 and 296°K

The lattice dynamics and the elastic constants of thallium at 77 and 296°K were worked out with twelve second order parameters based on Keating's approach. The agreement between theory and measurement is satisfactory. The results are compared with those of Worlton and Schmunk who have used the MAS model with thirteen parameters to fit their dispersion data. © 1972.