′�?, which has a frequency of 295 cm−one, is attributed into the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−one phonon corresponds towards the crystal IR absorption edge, rather then the residual absorption peak. Density useful concept computations exhibit the residual absorption in the BGSe crystal https://baga4se7crystal29529.dgbloggers.com/33063172/how-much-you-need-to-expect-you-ll-pay-for-a-good-baga4se7-crystal