The complexity and diversity of the genesis of natural minerals and their geochemical background result in complex and diverse variations in the chemical composition and physical properties of the same mineral. The most important reason or manifestation of this change is the phenomenon of natural minerals having specific and extremely common isomorphism. Therefore, studying isomorphism has become a key to understanding the complexity and variability of mineral chemical composition and its physical and chemical properties, and it is also an important part and characteristic of mineralogy and mineral materials research.