ВЛИЯНИЕ КОНЦЕНТРАЦИИ КАТИОНОВ БОРА В КРИСТАЛЛАХ НИОБАТА ЛИТИЯ НА ТИП И КОНЦЕНТРАЦИЮ ТОЧЕЧНЫХ СТРУКТУРНЫХ ДЕФЕКТОВ КАТИОННОЙ ПОДРЕШЕТКИ

Abstract

Doping a charge of congruent composition (R = [Li]/[Nb] = 0,946) by boric acid leads to an increase in stoichiometry (R = 0,96) of the LiNbO3:B (144·10-5 wt % B in the cone) crystal. The LiNbO3:B crystal was studied by the X-ray diffraction analysis. It was found that in the LiNbO3:B crystal there are no NbLi defects, but there are NbV defects. It has been shown that the localization of the boron cation in the structure of the LiNbO3:B crystal near the NbV defect will be most preferable in the faces of vacant tetrahedral voids common with lithium or vacant oxygen octahedra O6.