NOT KNOWN FACTUAL STATEMENTS ABOUT BAGA4SE7 CRYSTAL

′�?, that has a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption with the 295 cm−one phonon corresponds on the crystal IR absorption edge, instead of the residual absorption peak. Density functional idea computations show which the residual absorption of your BGSe crystal originate