Synonym: iridescent layers
https://doi.org/10.1351/goldbook.S05499
In some systems, sedimenting particles form layers separated by approximately equal distances of the order of the @W06659@ of light. This gives rise to strong colours when observed in reflected light and the system is said to form iridescent layers or Schiller layers.
Source:
PAC, 1972, 31, 577. (Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry) on page 611 [Terms] [Paper]