Abstract
An experimental NMR study of the 6Li isotope in single crystals of lithium niobate has been performed, along with a computer simulation of 6Li NMR spectra for a crystal of congruent composition, containing defects in the cation sublattice. It is found that the mean value of the principal component of the electric field gradient tensor at the 6Li nuclei is 1.48 times larger than at the 7Li nuclei. It is surmised that there is a substantial difference in the character of the mobility of the 6Li and 7Li nuclei in the LiO6 octahedra at room temperature.
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