LATTICE DYNAMICS OF AIIBIVCV2 AND AIBIIICVI2 SEMICONDUCTORS WITH CHALCOPYRITE LATTICE IN A RIGID-ION MODEL A. S. POPLAVNOI et V. G. TJUTEREV J. Phys. Colloques, 36 C3 (1975) C3-169-C3-176 DOI: 10.1051/jphyscol:1975331