Title: plastic transition Long Title: IUPAC Gold Book - plastic transition DOI: 10.1351/goldbook.P04691 Status: current Definition A first-order transition that occurs when a low-temperature phase transforms to an orientationally-disordered high-temperature phase with a strong variation of enthalpy. Related Terms - enthalpy: https://goldbook.iupac.org//terms/view/E02141 - first-order transition: https://goldbook.iupac.org//terms/view/F02390 Source - PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 588 (https://doi.org/10.1351/pac199466030577) Other Outputs - html: https://goldbook.iupac.org/terms/view/P04691/html - json: https://goldbook.iupac.org/terms/view/P04691/json - xml: https://goldbook.iupac.org/terms/view/P04691/xml Citation: Citation: 'plastic transition' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.P04691 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. Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . 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. Accessed: 2026-04-18T14:47:37+00:00