eng Science and Education Publishing Journal of Materials Physics and Chemistry 2333-4444 2015-05-29 3 1 6 10 10.12691/jmpc-3-1-2 JMPC2015312 article D S Yadav dhirendra.867@rediffmail.com 1 Department of Physics, Ch. Charan Singh P G College Heonra (Saifai) Etawah-206001 (U.P.) India In this paper a new approach utilizing the concept of plasma oscillations theory of solids has been applied to investigate the electronic properties such as homopolar gap (Eh), heteropolar or ionic gap (Ec), average energy gap (Eg), bond ionicity (fi) and electronic susceptibility (e) for the chemical bonds (A-C and B-C) in complex structured AIBIIICVI2 ternary chalcopyrite crystals. We have presented the expressions relating the electronic properties for these chalcopyrite crystals with plasmon energy (?֦p). The homopolar gap (Eh), heteropolar gap (Ec), average energy gap (Eg), bond ionicity (fi) and electronic susceptibility (ئe) of the bonds in these semiconductors exhibit a linear relationship when plotted on a log-log scale against the valence electron plasmon energy, which lies on the straight line. The calculated values of Eh, Ec, Eg, fi and ֦e have been compared with the available theoretical values reported by several workers so far. A fairly good agreement has been obtained between them. http://pubs.sciepub.com/jmpc/3/1/2/jmpc-3-1-2.pdf A Ternary chalcopyrites D Electronic properties D Optical properties