Title: dominant lamellae
Long Title: IUPAC Gold Book - dominant lamellae
DOI: 10.1351/goldbook.14257
Status: current

Definition
Lamellar crystals radiating from the center of the spherulite which, by splaying, constitute the initial skeleton of the spherulite.

Notes
1) Crystallization of dominant lamellae is largely associated with primary crystallization.
2) In the isothermal crystallization of crystalline polymers there is normally a single population of dominant lamellae, characterized by a single thickness.
3) The thickness and perfection of dominant lamellae is greater than for subsidiary lamellae, especially in non-isothermal crystallization.

Related Terms
- isothermal crystallization: https://goldbook.iupac.org//terms/view/14266
- non-isothermal crystallization: https://goldbook.iupac.org//terms/view/14267
- subsidiary lamellae: https://goldbook.iupac.org//terms/view/14258

Source
- 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)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/14257/html
- json: https://goldbook.iupac.org/terms/view/14257/json
- xml: https://goldbook.iupac.org/terms/view/14257/xml

Citation: Citation: 'dominant 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.14257
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Accessed: 2026-08-01T22:59:34+00:00