Topology of subsolidus isothermal sections of the phase diagrams of ternary reciprocal systems without continuous solid solutions

The topological properties were studied for isobaric-isothermal subsolidus sections of the phase diagrams of ternary reciprocal systems with phases of constant compositions or limited solid solutions. Systems with the triangulation schemes of diagonal and adiagonal types were analyzed. Relations between the topological parameters of graphs corresponding to such schemes were found. Algorithms for solving the problems of generation and enumeration of these triangulation schemes were presented. A wide diversity of types of triangulations was demonstrated. Their classification was proposed.