NOT KNOWN FACTS ABOUT BAGA4SE7 CRYSTAL

′�?, having a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−one phonon corresponds towards the crystal IR absorption edge, rather then the residual absorption peak. Density purposeful idea computations clearly show which the residual absorption of the BGSe crysta