′�?, using a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−1 phonon corresponds on the crystal IR absorption edge, as an alternative to the residual absorption peak. Density useful principle computations clearly show that the residual absorption in https://baga4se7-crystal38270.techionblog.com/32824832/the-smart-trick-of-baga4se7-crystal-that-nobody-is-discussing