′�?, having a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−1 phonon corresponds to the crystal IR absorption edge, instead of the residual absorption peak. Density practical theory computations show that the residual absorption of the BGSe crystal https://baga4se7-crystal41738.blogdon.net/rumored-buzz-on-baga4se7-crystal-48921894