NOT KNOWN DETAILS ABOUT BAGA4SE7 CRYSTAL

′�?, with a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−1 phonon corresponds for the crystal IR absorption edge, instead of the residual absorption peak. Density functional concept computations show which the residual absorption with the BGSe crystal originates thr