Analysis of a three-component model phase diagram by Catastrophe Theory
Abstract
We analyze the thermodynamical potential of a lattice gas model with three components and five parameters using the methods of Catastrophe Theory. We find the highest singularity, which has codimension five, and establish its transversality. Hence the corresponding seven-degree Landau potential, the canonical form Wigwam or A6, constitutes the adequate starting point to study the overall phase diagram of this model.
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