What Is Polysomy?

Polysomy refers to two or more crystalline modules with different properties. According to different proportions and / or stacking orders, they are constructed into a variety of characteristics with different structures and chemical compositions. Such a series of crystals together form a multibody series, and each member of the series is a multibody of the series.

Polysomy

Right!

Polysomy, refers to two or more different properties

The crystallography module is a structure-chemical unit that is envisioned to be cut out from a given crystal structure in a certain way. Each module has its own spatial range. Usually, layered modules that extend infinitely in two dimensions or rod-shaped modules that extend infinitely in one dimension are usually selected. The module itself generally does not contain a complete unit cell, but any module should be cut in such a way that it can still contain many of the basic characteristics of a complete crystal structure, such as various coordination polyhedra inherent in the structure, to maintain Same chemical composition as the complete crystal. In addition, no matter which layered module or rod-shaped module is a two-dimensional or one-dimensional translation lattice. The two crystallographic modules that make up any multibody, the repetition of the translation lattice

The polymorphism of the layered module is similar in some respects to that of the crystal. The fundamental difference between them is that the two (or several) modules constituting different polybodies in the same series must be structural-chemical units that are different in structure and chemical composition, and all of the different polytypes of the same substance The structural unit layer must be structural-chemical units that are structurally and chemically identical (or at least substantially the same). Therefore, polymorphism and polymorphism are two fundamentally different crystalline chemical properties. Of course, some polysomes can also have polymorphism at the same time, for example, amphibole. But as two different concepts, the way they divide modules and structural component layers is definitely different.

Using the knowledge of polysomy, we can reveal the inherent connection and inherent regularity existing between the polys in the same series, and we can predict what polys may exist, and their components, structures, physical properties, Chemical properties and forming conditions. JB Thompson predicted some possible polymorphisms in 1968, and later some of them were discovered as new minerals such as magnesite and amphibole. In addition, multi-body knowledge is also an inspiring tool for teaching mineralogy.