NOT KNOWN FACTS ABOUT BAGA4SE7 CRYSTAL

′�?, with a frequency of 295 cm−one, is attributed to the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−1 phonon corresponds into the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful principle computations present that the residual absorption of the BGSe crystal orig