sentence: Crystallization can be divided into stages - primary nucleation is the first.
sentences_after: Secondary nucleation requires existing crystals to perpetuate crystal growth. In our sugar example, we had obtained such nuclei when the 'excess' sugar had just about crystallized out assisting further crystal formation. Secondary nucleation is the main stage in crystallization for this is what causes the 'mass production' of crystals.
concept_name: crystallization
headings: Crystallization
categories: Chemistry