Abstract
Single crystals of hydrogen-doped lithium nitride have been grown and relative estimates of dopant concentrations obtained from infra-red transmission studies. This technique together with nuclear reaction analyses has also been used to characterize surface layers of lithium hydroxide/lithium carbonate which form readily on the crystals when exposed to the atmosphere. Complex plane analysis of a.c. conductivity data in the temperature range 25–200°C has enabled the separation of bulk crystal and surface layer properties. A value of 2.8 10 −3 Ω −1 cm −1 at 25°C, with an activation energy of 0.23 ev, for ionic transport perpendicular to the c-axis, within the bulk of the crystal, has been achieved.
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