′�?, having a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−one phonon corresponds for the crystal IR absorption edge, as opposed to the residual absorption peak. Density practical principle computations show that the residual absorption in the BGSe https://baga4se7crystal29639.blogoxo.com/32967797/how-much-you-need-to-expect-you-ll-pay-for-a-good-baga4se7-crystal