CRYSTALLIZATION -Definition, Principle, Demonstration, Application, Advantage of Crystallization , Practice Problems, and FAQs Crystallization Process Crystallization requires two events to occur. First, on the microscopic scale, atoms or molecules cluster together in a process known as nucleation. If the clusters become stable and large enough, crystal formation may ensue. Nucleation Nucleation is the initial stage or phase in the crystallization process. The initial atom to form a crystal forms the nucleus of the nucleation, and other atoms form around that nucleus. More unit cells assemble around the nucleus ... Crystallization is the process of forming solid material from a liquid solution or melt, where the solid material formed has crystalline (as opposed to amorphous) structure. A crystallization process generally has the following characteristics: Crystallization is the formation of ordered structures from liquids or gases through nucleation, growth, and aggregation. Learn how crystallization occurs in nature and industry, and how factors such as temperature, solvent, and impurities influence it.