′�?, which has a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−1 phonon corresponds into the crystal IR absorption edge, rather then the residual absorption peak. Density purposeful idea computations demonstrate that the residual absorption with the BGSe https://baga4se7crystal95143.blogsidea.com/39086377/how-much-you-need-to-expect-you-ll-pay-for-a-good-baga4se7-crystal