Table 6 Structural parameters extracted from quantitative EXAFS curve-fitting using the ARTEMIS module of DEMETER
Sample | Atoms | Coordination number, CN | Interatomic distance (Å) | Debye–Waller factor, σ2 (10−3 Å2) | Energy shift, e0 (eV) | R-factor, r |
|---|---|---|---|---|---|---|
RPW02 | Fe–O | 5.70 ± 0.76 | 1.98 ± 0.05 | 9.9 ± 1.4 | − 3.79 ± 1.49 | 0.01 |
|  | Fe–Fe | 0.74 ± 0.18 | 2.91 ± 0.02 | 3.4 ± 2.1 | − 8.47 ± 4.42 |  |
|  | Fe–Fe | 1.83 ± 0.57 | 3.36 ± 0.02 | 3.4 ± 2.1 | − 8.47 ± 4.42 |  |
|  | Fe–O | 4.88 ± 1.90 | 3.58 ± 0.06 | 9.9 ± 1.4 | − 3.79 ± 1.49 |  |
RSW01 | Fe–O | 3* | 1.90 ± 0.04 | 8.1 ± 6.4 | − 2.79 ± 2.03 | 0.016 |
|  | Fe–O | 3* | 2.02 ± 0.05 | 8.1 ± 6.4 | − 2.79 ± 2.03 |  |
|  | Fe–Fe | 6.52 ± 2.71 | 3.04 ± 0.03 | 11.5 ± 3.0 | 9.19 ± 3.03 |  |
|  | Fe–Fe | 4.53 ± 2.70 | 3.33 ± 0.02 | 11.5 ± 3.0 | 9.19 ± 3.03 |  |