Extended Data Fig. 1: Fitting of Gaussian distributions to the total PDF for molten PuO1.76.

a, Fitting a single PuO distribution to the leading edge of the first peak, and a single PuPu distribution to the leading edge of the second peak. b, Optimized peak fitting for all pair correlations, guided by the bond distances and coordinations anticipated from f-PuO2 and α-Pu2O3 crystal structures.