{"term":{"id":"15365","title":"ternary diagram","longtitle":"IUPAC Gold Book - ternary diagram","doi":"10.1351\/goldbook.15365","code":"15365","status":"current","synonym":"<em>synonym<\/em>: Gibbs’ triangular representation","definitions":[{"id":1,"text":"Triangular plot (usually an equilateral or right-angled triangle) whose vertices represent the pure components of a ternary system at constant temperature and pressure. Any point within the triangle represents the composition in terms of the two independent mole (or mass) fractions. Lines parallel to the sides of the triangle represent constant proportions of the respective components (isopleths).","notes":{"1":"In an isobaric diagram, an axis perpendicular to the plane of the triangle may be added to represent temperature.","2":"In addition, any triangle of any shape, including any triangle within the main triangle, can be used to obtain the composition of the system represented by a point within the triangle in terms of the compositions represented by its vertices."},"links":[{"term":"components","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/16268"},{"term":"isopleths","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/15336"},{"term":"ternary system","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/15366"}],"sources":["PAC, 2008, 80, 233. 'Glossary of terms related to solubility (IUPAC Recommendations 2008)' on page 269 (https:\/\/doi.org\/10.1351\/pac200880020233)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/15365\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/15365\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/15365\/plain"},"citation":"Citation: 'ternary diagram' 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.15365","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":"2026-04-19T00:50:54+00:00"}}