Figure 4
Comparison of k3-weighted EXAFS (a) and pre-edge (b) Cu K-edge spectra for a pure α-FeO(OH) (goethite) containing copper (2000 ppm). Measurements were made in the fluorescence mode using a crystal analyser (Eanalyser = EKα1, energy resolution = 1.4 eV) and 13-element Ge solid-state detector (ESSD = EKα1+2, energy resolution = 300 eV). Δχ: experimental points distribution used for the signal-to-noise ratio determination. |