participates in heterogeneous mixture dispersion true dispersion A dispersions is a heterogeneous mixture that is comprising more than one phase where at least one of the phases consists of finely divided phase domains, often in the colloidal size range, dispersed throughout a continuous phase. [IUPAC] "Terminology of polymers and polymerization processes in dispersed systems (IUPAC Recommendations 2011)" . Pure and Applied Chemistry. 83 (12): 2229–2259. 2011. 2017-07-03 Changed definition to IUPAC recommendation. [Allotrope] dispersed state