As shown in Fig. , the scattering patterns for this mixture show increased critical fluctuations with decreasing temperature, as expected for UCST behavior. Also shown is a simultaneous fit of the scattering at all temperatures using independent values of ξ and I Q=0 at each T , but a single value of η, as done previously in Ref. 64. Using these values, all curves collapse onto a single master curve, Fig. . Values of exponents γ and η and the associated T sp are obtained from fits shown in Fig. and reported in Table . The fitted critical exponents are consistent with the 3D Ising model, having reported values of ν = 0.63 and γ = 1.24. The temperature scaling observed here is the same as we previously reported for complex, five-component malonamide/dodecane organic phases. This highlights the universality of critical phenomena in its ability to describe a wide range of LLE organic phases, even when the nature of the aggregation is driven by different types of intermolecular interactions, i.e., amphiphile self-association versus clustering of extractant-metal complexes.