Recrystallization
The recrystallization is a process diagenetic which implies a change of crystallinity of the preexistent phase, without chemical modification. Examples: increase in the intermediate size of the crystals by coalescence in an already crystallized mass; " inversion" Aragonite in Calcite.
Recrystallization The solid compounds obtained by organic synthesis or extracted from natural substances are often contaminated by small quantities of impurities. The usual technique of their purification is the recrystallization, founded on their difference in hot and cold solubility in solvents. The solubility of a solid generally increases with the temperature; also, when it is solubilized in a hot solvent, its crystallization perhaps caused by the cooling of the solution until its supersaturation. The recrystallization thus consists in with the setting of solution of the solid purifying in a solvent or a mixture of several solvents, generally with boiling, then with the cooling of the solution, which involves the crystallization of the solid, insulated then by filtration.
Flemish Eddy, Jacques Bilodeau, Organic chemistry experiment of laboratory, Griffon, p.5
Recrystallization
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