NOT KNOWN FACTUAL STATEMENTS ABOUT BAGA4SE7 CRYSTAL

′�?, using a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption of the 295 cm−1 phonon corresponds to the crystal IR absorption edge, rather then the residual absorption peak. Density practical concept computations exhibit that the residual absorption in the BGSe crystal originates in