The lattice dynamics of 12 chalcopyrite type compounds CuAlS₂, CuGaS₂, CuInS₂, AgGaS₂, AgGaSe₂, AgInSe₂, ZnSiP₂, ZnGeP₂, CdSiP₂, CdGeP₂, CdSnP₂, and CdGeAs₂ have been investigated based on a 5-parameter model involving two short range stretching force constants, an interaction constant, and the effective dynamic charges of the cations. The calculated force constants, normal co-ordinates and potential energy distributions are compiled and discussed.

Keywords: chalcopyrites, lattice dynamics, force constants, vibrational spectra

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