Fig. 4. Fourier transform of room temperature Ac³⁺ L₃-edge EXAFS spectra displaying the magnitude and imaginary space (points) with non-linear curve fitting (lines) of Ac³⁺ cations dissolved in (NH₄)O₂CMe_(aq):HO₂CMe_(aq) (top, 15 M) and (bottom, 0.2 M), pH = 5.5.