NOT KNOWN DETAILS ABOUT BAGA4SE7 CRYSTAL

′�?, which has a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−1 phonon corresponds on the crystal IR absorption edge, instead of the residual absorption peak. Density purposeful idea computations exhibit the residual absorption from the BGSe crystal originates in