ABSTRACT
In [75], the complex scalar function \II ( r) for anisotropic material is introduced as before but the free energy is written not in the form (7.12) but as
(7.35)
where doubly occurring indices are summed and, in [75], the charge e is taken instead of 2eo; and for an isotropic or cubic material, m 1 = m2 = m3 = m, and we obtain equation (7.12).
