Table 3 Hyperfine parameters derived from room temperature SMS spectra of ε-Fe2O3. Uncertainties in the hyperfine parameters are indicated in brackets. Component column refers to the color in which each site is displayed in Fig. 5
From: Stability and nature of the volume collapse of ε-Fe2O3 under extreme conditions
Pressure (GPa) | Fe site | Component | CSa | QSb | Area | FWHMc | BHFd |
|---|---|---|---|---|---|---|---|
mm∙s−1 | mm∙s−1 | % | mm∙s−1 | T | |||
1 bar | Fe(window) | Doublet (gray)e | 0.15 | 0.41 | 5.4 | 0.27 | — |
Fe3+(1,2) | Sextet (blue) | 0.37(3) | −0.05(5) | 43.0(21) | 0.46(7) | 39.1(2) | |
Fe3+ (3) | Sextet (red) | 0.39(2) | −0.22(2) | 24.5(21) | 0.40(4) | 44.5(9) | |
Fe3+ (4) | Sextet (green) | 0.21(3) | −0.19(7) | 27.1(27) | 0.56(9) | 25.9(3) | |
27.5 GPa | Fe(window) | Doublet (gray)e | 0.15 | 0.41 | 6.1 | 0.27 | — |
Doublet (orange) | 0.35(2) | 1.33(4) | 32.5(3) | 0.71(6) | — | ||
Fe3+(1,2) | Sextet (blue) | 0.32(3) | 0.39(5) | 36(2) | 0.64(6) | 49.9(1) | |
Fe3+ (3) | Sextet (red) | 0.18(14) | 0.1(3) | 18.1(13) | 1.4(3) | 42.6(9) | |
Fe3+ (4) | Sextet (green) | 0.48(17) | −0.3(3) | 7.1(24) | 0.7(4) | 18.6(10) | |
36.5 GPa | Fe(window) | Doublet (gray)e | 0.15 | 0.41 | 6.9 | 0.27 | — |
Doublet (orange) | 0.31(2) | 1.30(3) | 43(3) | 0.64(5) | — | ||
Fe3+(1,2) | Sextet (blue) | 0.30(2) | 0.54(5) | 30(2) | 0.44(5) | 49.7(1) | |
Fe3+ (3) | Sextet (red) | 0.21(12) | 0.5(2) | 15.0(12) | 1.0(3) | 44.8(8) | |
Fe3+ (4) | Sextet (dark green) | 0.13(6) | −0.24(13) | 6(2) | 0.26(19) | 17.1(5) |
