′�?, by using a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−1 phonon corresponds into the crystal IR absorption edge, rather then the residual absorption peak. Density useful theory computations clearly show the residual absorption of the BGSe https://baga4s7crystal30727.ourcodeblog.com/32928678/not-known-facts-about-baga4se7-crystal