′�?, that has a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−one phonon corresponds on the crystal IR absorption edge, as an alternative to the residual absorption peak. Density functional theory computations exhibit that the residual absorption with https://baga4se7-crystal49495.aboutyoublog.com/35840933/not-known-factual-statements-about-baga4se7-crystal