The dielectric properties of muscovite mica along the cleavage planes

The dielectric responses of mica along the cleavage planes has been measured in the frequency range between 0.01 Hz and 100 kHz and in the temperature range between 368K and 173K. The loss parallel to the planes is two to three orders of magnitude higher that that measured normal to the planes. The response is due to relaxation of ions along the cleavage planes, including interlaminal and surface water molecules.