“…For instance, they are widely used as non-linear optical materials (HgGa 2 S 2 and Cd 1−X Hg X Ga 2 S 4 [1,2]), as photosensitive materials (ZnGa 2 Se 4 [3]), or as narrow-band optical filters (CdGa 2 S 4 [4]). An important feature of these compounds is their low sensitivity to impurities and high resistance to ionizing radiation [5].…”