′�?, with a frequency of 295 cm−one, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−one phonon corresponds on the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful principle computations exhibit that the residual absorption from the BGSe crystal https://baga4se7crystal35789.blogprodesign.com/54263373/baga4se7-crystal-can-be-fun-for-anyone