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  CRYSTALLIZATION  CRYSTALLIZATION a process where solid particles are formed from a homogeneous phase a solid-liquid separation process for control:  – yield of crystals  – purity of crystals  – sizes and shapes of crystals   A crystal is a highly organized array of atoms, molecules, or ions arranged in three-dimensional space lattices.  Common methods to achieve supersaturation Cooling (with some exceptions)  – achieved near a heat-transfer surface Solvent evaporation  – achieved near a heat-transfer surface Drowning  – addition of nonsolvent, which decreases the solubility of the solid Chemical reaction  – decreases the solubility of the dissolved solvent, leading to supersaturation
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