NOT KNOWN FACTUAL STATEMENTS ABOUT BAGA4SE7 CRYSTAL

′�?, with a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−one phonon corresponds for the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional idea computations display which the residual absorption from the BGSe crystal origin