Description:
<jats:title>Abstract</jats:title><jats:p>The phonon modes of the ternary compounds CuGaS<jats:sub>2</jats:sub>, CuGaSe<jats:sub>2</jats:sub>, and the CuGaS<jats:sub>2<jats:italic>x</jats:italic></jats:sub>Se<jats:sub>2(1−<jats:italic>x</jats:italic>)</jats:sub> solid solution are investigated by means of IR and Raman Spectroscopy. The dependence of the frequences on the composition of the solid solutions is obtained. It is shown that the lattice vibrations of the solid solutions display mixed type behaviour.</jats:p>