Term: ringing gel https://doi.org/10.1351/goldbook.RT07529 Definition: Gel with energy dissipation in the acoustic frequency range. Note: A ringing @G02600-2@ is often a @HT07519@ with a surfactant as a third component and has a composition within an @I03353@, one-phase region of its ternary phase diagram. Related Terms: 1) gel (http://doi.org/10.1351/goldbook.G02600-2). 2) hydrogel (http://doi.org/10.1351/goldbook.HT07519). 3) isotropic (http://doi.org/10.1351/goldbook.I03353). 4) gel (http://doi.org/10.1351/goldbook.G02600-1). Source: PAC, 2007, 79, 1801. 'Definitions of terms relating to the structure and processing of sols, gels, networks, and inorganic-organic hybrid materials (IUPAC Recommendations 2007)' on page 1808 (https://doi.org/10.1351/pac200779101801) Citation: 'ringing gel' 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.RT07529 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. 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.