′�?, that has a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−1 phonon corresponds on the crystal IR absorption edge, as an alternative to the residual absorption peak. Density practical idea computations show that the residual absorption with https://lukaswcfpn.p2blogs.com/31838839/not-known-factual-statements-about-baga4se7-crystal