FIG. 3.

Back transformed Fourier-filtered first-shell EXAFS spectra [(a) and (c)] and the Fourier transform of this filtered EXAFS [(b) and (d)] for 0.06M Cu(ClO₄)₂ dissolved in 0.6M HClO₄ in 40% aqueous (top) 1,3-propanediol or (bottom) 1,5-pentanediol frozen glass. The fitted models are as follows: (blue line) square pyramid, (red line) JT-octahedron, or (green line) split axial. The dotted lines of the same color indicate the unfit residual.