Berlin 2008 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 17: Poster I

DY 17.40: Poster

Dienstag, 26. Februar 2008, 16:00–18:00, Poster C

Understanding Oscillatory Zoning in binary solid solution — •Tanja Mues and Andreas Heuer — Institut für physikalische Chemie, Universität Münster, 48149 Münster

Oscillatory Zoning (OZ) is a phenomenon common to many geologically formed crystals. A model of OZ in a binary solid solution grown from an aqueous solution can be described by a system of nonlinear partial differential equations, which were analysed in one dimension in the past. It combines species diffusion in the solution, particle adsorption, surface diffusion and subsequent desorption and incorporation into the crystal. We expand this scheme to two dimensions and check whether the growth behavior displays new characteristics as compared to the 1D case. In particular we elucidate whether the growth pattern is homogeneous, i.e. does not display concentration fluctuations along the surface and whether the limits of stability, obtained for the 1D case, still hold. This is checked via a linear stability analysis as well as a numerical simulation of the partial differential equations.