Avrami equation 

https://doi.org/10.1351/goldbook.A00545
An equation, describing crystallization kinetics, of the form: 1−φc=eK tn where φc is the crystalline volume fraction developed at time t and constant temperature, K and n are suitable parameters. K is temperature dependent. According to the original theory, n should be an integer from 1 to 4, the value of which should depend only on the type of the statistical model; however, it has become customary to regard it as an adjustable parameter that may be non-integral.
Source:
Purple Book, 1st ed., p. 85 [Terms] [Book]
Citation: 'Avrami equation' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.A00545 RIS BibTex EndNote
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Last revised: February 24, 2014