′�?, which has a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−one phonon corresponds for the crystal IR absorption edge, rather then the residual absorption peak. Density practical principle computations demonstrate that the residual absorption of the BGSe https://damienntrro.vidublog.com/31892609/5-easy-facts-about-baga4se7-crystal-described