Internal thermal reactions in minerals and materials

Rebuilding reactions of the internal structure of minerals and their artificial analogues are considered. Solid products of these reactions are formed within the structure of the parent substance. This factor determines the course of the reactions and product formation. The mechanism of internal thermal dissociation and rebuilding reactions of internal structure connected with segregation of chemical components and their redistribution (crystallization of multicomponent amorphous solids) is discussed. The internal pressure of gaseous decomposition products and rate of diffusion of chemical components are critical factors influencing kinetics of these processes. Diffusional mass transfer during internal structure rebuilding reactions is directed by acid-base interaction of the parent-structure components; this determines the stages of the reaction pathway.