′�?, having 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 into the crystal IR absorption edge, rather than the residual absorption peak. Density useful concept computations clearly show which the residual absorption from the BGSe https://brooksmcpal.bloggactif.com/33985164/rumored-buzz-on-baga4se7-crystal