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From the study of the temperature dependence of quadrupole coupling constants and linewidths a detailed insight into the diffusion of Li in Li 3 N has been achieved. In accordance with the strong anisotropy of the ionic conductivity the authors found two vacancy-induced diffusion mechanisms for Li ions, one within the Li 2 N layers and another one perpendicular to them. The second one involves both types of Li position. The jump frequency for the diffusion within the Li 2 N layers increases strongly with the concentration of hydrogen in the samples.
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Messer et al. (1981) studied this question.
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