′�?, with a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption from the 295 cm−1 phonon corresponds into the crystal IR absorption edge, in lieu of the residual absorption peak. Density useful theory computations clearly show the residual absorption of the BGSe https://baga4se7crystal45790.blogoscience.com/38662944/how-much-you-need-to-expect-you-ll-pay-for-a-good-baga4se7-crystal