Term: interphase transition https://doi.org/10.1351/goldbook.I03119 Definition: A transition that occurs at boundaries between phases. Example: The precipitation of second phases or the initiation of new phase growth at an interface. Related Terms: 1) precipitation (http://doi.org/10.1351/goldbook.P04795). 2) initiation (http://doi.org/10.1351/goldbook.I03042). 3) interface (http://doi.org/10.1351/goldbook.I03082). Source: PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 584 (https://doi.org/10.1351/pac199466030577) Citation: 'interphase transition' 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.I03119 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.