subsidiary lamellae

in a spherulite
synonym: infilling lamellae
https://doi.org/10.1351/goldbook.14258
Lamellar crystals nucleated either epitaxially or incoherently on dominant lamellae.
Notes:
  1. Subsidiary lamellae can appear as pockets of lamellae in different locations within a spherulite, with no well-defined relation to dominant lamellae.
  2. Crystallization of subsidiary lamellae is generally associated with secondary crystallization, but may start before dominant lamellae meet at spherulite boundaries.
  3. The thickness and perfection of subsidiary lamellae is reduced as compared to dominant lamellae, especially in non-isothermal crystallization.
  4. In typical crystalline polymers there may be populations of subsidiary lamellae characterized by bimodal thickness distributions.
Source:
PAC, 2011, 83, 1831. (Definitions of terms relating to crystalline polymers (IUPAC Recommendations 2011)) on page 1858 [Terms] [Paper]
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. https://doi.org/10.1351/goldbook.14258 RIS BibTex EndNote
Div. IVTextXMLJSON