Title: multilayer aggregate Long Title: IUPAC Gold Book - multilayer aggregate DOI: 10.1351/goldbook.M04051 Status: current Definition A stack of lamellar crystals generated by spiral growth at one or more screw dislocations. The axial displacement over a full turn of the screw (Burgers vector) is usually equal to one lamellar thickness. Related Term - lamellar crystals: https://goldbook.iupac.org/terms/view/L03446 Source - Purple Book, 1st ed., p. 82 (http://old.iupac.org/publications/books/author/metanomski.html) Other Outputs - html: https://goldbook.iupac.org/terms/view/M04051/html - json: https://goldbook.iupac.org/terms/view/M04051/json - xml: https://goldbook.iupac.org/terms/view/M04051/xml Citation: Citation: 'multilayer aggregate' 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.M04051 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: 2026-08-08T20:19:11+00:00