Crystallization

—1. The formation of substances as symmetrical solids or crystals, which are definite geometrical figures bounded by flat surfaces. To the chemist and mineralogist the form and appearance of the crystal are generally sure indications of its constitution. 3 2. The arrangement of the molecules of a fluid substance or liquid into crystalline bodies on cooling, or through thickening by evaporation, as with saline solutions. 3. The rearrangement of the molecules of a metal into crystalline structure under alterations of stre or overload, as with a crane chain or a steel rail. 4 4. The depositing of crystals in a metal by the action of electrolysis.