In the present work, FTIR spectra of pure and doped ADP crystals were compared and the complete vibrational band
assignments were carried out. The comparative FTIR spectral studies confirm the presence of borate ion and the
nitrate ion in the respective doped crystals. In the present work, the FTIR spectra of pure and doped ADP single
crystals were presented in Figures 4, 5 and 6 respectively.