“…In order to overcome the problem some dopants are added to suppress the effect of metal ion impurities on ADP and KDP crystals, for example EDTA or KCl reduces the effect of metal ion impurities and enhances the metastable zone width and increases the growth rate of the crystals [11]. In our earlier papers we have reported the growth of /1 0 0S directed ADP [12] and the effect of DL-malic acid [7], L-lysine monohydrochloride [4], oxalic acid [5], ammonium malate [13], Ni 2 + [14], Co 2 + [15], L-asparagine monohydrate [16] and ammonium chloride on ADP [17,18], in which the ammonium malate doped ADP crystals, show higher crystalline perfection and growth rate. Ammonium chloride doped ADP has high growth rate and SHG efficiency.…”