To simplify the modeling procedure, the kolinite particles with disordered b axis, Fig. 1(b), in which the hexagonal shape is less distinct [5] was assumed as disc-shaped. Another simplification is to consider the existence of only one basic geometrical shape for each clay. Obviously, this does not correspond to reality. In nature, clays are complex systems usually composed of minerals with different shapes and compositions [4]. The preliminary scope of the present work, however, justifies these simplifications. For each type of clay, Table 1 and Fig.1 modeling details are now presented.