Abstract
For the purposes of modeling and classification of structures and textures of bimineral rocks, a diagram of a new type is proposed — a barycentric tetrahedron (piii, piij, pijj, pjjj) of probabilities of ternary intergrain contacts. The position of the Hardy-Weinberg equilibrium line is calculated. Correspondences between the classification fields and boundaries in the barycentric tetrahedron and the previously proposed barycentric triangle (pii, pij, pjj) of the probabilities of binary intergrain contacts are established. The prospects for the classification of petrographic structures and textures in a barycentric tetrahedron based on Newton's classification of curves of the 3rd order are discussed.
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