NOT KNOWN FACTS ABOUT BAGA4SE7 CRYSTAL

′�?, with a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The 2-phonon absorption of the 295 cm−1 phonon corresponds to the crystal IR absorption edge, as an alternative to the residual absorption peak. Density practical theory computations demonstrate that the residual absorption of the BGSe crystal or