14250 IUPAC Gold Book - lamellar crystal sector 10.1351/goldbook.14250 14250 current 1 Portion of a lamellar crystal, often bounded by a well-defined crystal face. The term generally applies to solution-crystallized lamellar crystals. Sectors are described using the indexing of the crystal face bounding it. The fold plane prevailing in a sector is normally assumed to correspond to the crystal face bounding the sector. For some crystal morphologies, the fold surfaces of a sector make an angular discontinuity with the fold surfaces of contiguous sectors. Lamellar crystal sectors in folded-chain crystals correspond to fold domains. PAC, 2011, 83, 1831. 'Definitions of terms relating to crystalline polymers (IUPAC Recommendations 2011)' on page 1855 (https://doi.org/10.1351/PAC-REC-10-11-13) https://goldbook.iupac.org/terms/view/14250/html https://goldbook.iupac.org/terms/view/14250/json https://goldbook.iupac.org/terms/view/14250/plain Citation: 'lamellar crystal sector' 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.14250 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. 2026-08-02T09:03:28+00:00