Term: carbon fibre https://doi.org/10.1351/goldbook.C00831 Definition: Fibres (filaments, tows, yarns, rovings) consisting of at least 92% (mass fraction) carbon, usually in the non-graphitic state. Note: Carbon fibres are fabricated by @P04961@ of organic precursor fibres or by growth from gaseous @H02889@. The use of the term @G02686@ instead of carbon fibres as often observed in the literature is incorrect and should be avoided. The term @G02686@ is justified only if three-dimensional crystalline order is confirmed, e.g. by X-ray @D01711@ measurements. Related Terms: 1) pyrolysis (http://doi.org/10.1351/goldbook.P04961). 2) hydrocarbons (http://doi.org/10.1351/goldbook.H02889). 3) graphite fibres (http://doi.org/10.1351/goldbook.G02686). 4) diffraction (http://doi.org/10.1351/goldbook.D01711). 5) mass fraction (http://doi.org/10.1351/goldbook.M03722). 6) carbon (http://doi.org/10.1351/goldbook.C00821). Source: PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 480 (https://doi.org/10.1351/pac199567030473) Citation: 'carbon fibre' 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.C00831 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.