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Formation of Liesegang patterns: A spinodal decomposition scenario

T. Antal, M. Droz, J. Magnin, Z. Rácz

cond-mat.stat-mecharXiv:cond-mat/9903420

Abstract

Spinodal decomposition in the presence of a moving particle source is proposed as a mechanism for the formation of Liesegang bands. This mechanism yields a sequence of band positions xn that obeys the spacing law xn~Q(1+p)n. The dependence of the parameters p and Q on the initial concentration of the reagents is determined and we find that the functional form of p is in agreement with the experimentally observed Matalon-Packter law.

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