The β-radiation nuclear magnetic resonance/relaxation method was used to monitor 8Li nuclei in 7Li3N monocrystals. The electric-field gradients at the 2 inequivalent lattice sites were determined at temperatures below 200K. The spin-lattice relaxation behavior at temperatures above 300K, and the 8Li nuclear magnetic resonance signals in the extreme narrowing range (above 500K), were attributed to interlayer diffusion that involved Li+ which jumped between the Li(1) and Li(2) lattice sites. The differing spin-lattice relaxation behaviors permitted a study to be made of Li+ intralayer diffusion that was confined to the Li2N layers. Ultra-slow interlayer, Li(1)-to-Li(2) jumps with correlation times of up to 10s were observed in this temperature regime. A non-exponential 8Li polarization decay was observed at temperatures below 200K.

B.Bader, P.Heitjans, H.J.Stöckmann, H.Ackermann, W.Buttler, P.Freiländer, G.Kiese, C.Van der Marel, A.Schirmer: Journal of Physics - Condensed Matter, 1992, 4[20], 4779-800