Importantly, the standard deviation of particle resonant frequencies dev[ω res,i ] varies nonmonotonically with η, and it increases with increasing U 0 or inclusion of quadrupoles (Fig- ). The shape and trends in dev[ω res,i ] closely mirror those of the ensemble extinction linewidth in Figure , an observation that is made clearer when the two quantities are plotted against one another (Figure ). This correlation highlights that the extremely broad ensemble extinction spectra observed at intermediate volume fractions is a reflection of the large variation in individual nanoparticle resonance frequencies. The same observation is represented visually in 5A. The black particle extinction peaks are all tall and narrow, with a large variation in peak position; when averaged together, they produce a low and broad ensemble peak. This feature of disordered configurations stands in stark contrast to ordered pair, long chain, and superlattice configurations, where particle extinction and ensemble extinction are identical.