excess Rayleigh ratio

https://doi.org/10.1351/goldbook.E02236
The difference between the @R05159@ for a @D01739@ and for pure solvent. If the @S05487@ intensity is not reduced to the @R05159@, the difference between the @S05487@ intensities for a @D01739@ and that for pure solvent is named 'excess @S05487@'.
Source:
Purple Book, 1st ed., p. 66 [Terms] [Book]