Conductivity and dielectric constants of LiD

The dielectric constant of LiD has been measured in the frequency region 5-500 kHz at different temperatures up to 340 ^∘{}C. Compared to the results of other workers, the LiD conductivity curves are found to be displaced slightly to lower values than those of LiH. Furthermore, it is also proved that the high ac-conductivity values found by other workers at low temperature in the case of LiH correspond not to true conductivity but are caused by reorientation of complexes. Activation energies corresponding to the motion of a free cation vacancy or the reorientation of complexes have been determined.