IR absorption spectra in the region of stretching and deformation vibrations of hydrogen bond in pure and alloyed single crystals of LiNbO3N.N. Novikova, V.А. Yakovlev and N.V. SidorovEPJ Web Conf., 132 (2017) 03058DOI: https://doi.org/10.1051/epjconf/201713203058