Abstract
7Li NMR spectra and spin-lattice relaxation in Li2Ge7O15 single crystal have been analyzed. It is shown that the NMR spectrum consists of quadrupolar triplets from 7Li (I = 3/2) nuclei located in structurally nonequivalent Li(1) and Li(2) sites (T = 300 K). On heating the quadrupolar splitting decreases as a result of thermal vibrations of 7Li quadrupolar axes whereas NMR lines narrow due to translational motion of lithium ions. Measurements of the spin-lattice relaxation rate T1−1 give information about the time scale and the activation energy of lithium ions motion. The results of NMR studies are compared with findings from electrical conductivity measurements.
Published Version
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