′�?, that has a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The two-phonon absorption of the 295 cm−one phonon corresponds for the crystal IR absorption edge, as an alternative to the residual absorption peak. Density practical theory computations show which the residual absorption on https://baga4se7-crystal40593.blog-ezine.com/32575996/not-known-facts-about-baga4se7-crystal