A numerical parameter, χ, employed in the @F02431@, which accounts in the main for the contribution of the non-combinatorial @E02149@ of mixing and for the @E02141@ of mixing.
Source: Purple Book, 1st ed., p. 59 [Terms] [Book]
Cite as: IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook.