′�?, using a frequency of 295 cm−one, is attributed to the stretching vibration of Ga–Se bonds. The two-phonon absorption on the 295 cm−1 phonon corresponds into the crystal IR absorption edge, as an alternative to the residual absorption peak. Density useful principle computations exhibit the residual absorption on the BGSe https://baga4se7crystal50482.bloggactif.com/33802685/not-known-details-about-baga4se7-crystal