Table 1. Mössbauer Parameters of the Sample MNPs at Room Temperature: Isomeric Shift (δ), Quadrupole Shift (2ε), and Hyperfine Field (Bhf)a.
| subspectrum | site and valence | δ (mm/s) | 2ε (mm/s) | Bhf (T) | area (%) |
|---|---|---|---|---|---|
| singlet | Fe3+ in SPM | 0.337(7) | 31.6(5) | ||
| sextet | (Fe3+)A | 0.328(4) | 0.007(4) | 46.40(2) | 18.4(2) |
| HMFD sextet | [Fe3+]B | 0.353(4) | –0.018(1) | 41.28(9)b | 50.0(4) |
a
Fitting assumed one SPM state (singlet), one tetrahedral (sextet), and one octahedral (HMFD sextet) position of FeIII.
b
BHF is the average value of HFMD.