Abstract

The effect of KOH doping on the dielectric properties of ice has been investigated in the range 70–250 K. The high frequency conductivity is almost independent of temperature from 130 to 220 K. This suggests that the majority charge carriers in this region are OH − ions: a lower limit on their mobility is estimated to be of the order of 10 −10 m 2 V −1s −1. It is suggested that the ions provide the relaxation mechanism for the transition to the proton-ordered phase ice XI.

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