14258 IUPAC Gold Book - subsidiary lamellae 10.1351/goldbook.14258 14258 current synonym: infilling lamellae 1 Lamellar crystals nucleated either epitaxially or incoherently on dominant lamellae. Subsidiary lamellae can appear as pockets of lamellae in different locations within a spherulite, with no well-defined relation to dominant lamellae. Crystallization of subsidiary lamellae is generally associated with secondary crystallization, but may start before dominant lamellae meet at spherulite boundaries. The thickness and perfection of subsidiary lamellae is reduced as compared to dominant lamellae, especially in non-isothermal crystallization. In typical crystalline polymers there may be populations of subsidiary lamellae characterized by bimodal thickness distributions. dominant lamellae https://goldbook.iupac.org//terms/view/14257 non-isothermal crystallization https://goldbook.iupac.org//terms/view/14267 PAC, 2011, 83, 1831. 'Definitions of terms relating to crystalline polymers (IUPAC Recommendations 2011)' on page 1858 (https://doi.org/10.1351/PAC-REC-10-11-13) https://goldbook.iupac.org/terms/view/14258/html https://goldbook.iupac.org/terms/view/14258/json https://goldbook.iupac.org/terms/view/14258/plain Citation: 'subsidiary lamellae' 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.14258 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. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . 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. 2026-08-03T02:14:54+00:00