A revised analysis of ferrihydrite at liquid helium temperature using Mössbauer spectroscopy
Abstract:
This dataset contains data which accompanies a research paper (Byrne & Kappler 2022, https://doi.org/10.2138/am-2021-7802) which addresses inconsistencies in the fitting of Fh and provide a more standardized approach to its identification by MBS. Using this data, we presented a systematic comparison of different fitting methods, notably based on Lorentzian and Voigt functions. We suggest that the most suitable approach to fitting pure Fh at liquid helium temperature is with two sextets (A and B) fitted using an extended Voigt based function with the ability to apply probability distributions to each hyperfine parameter. 2-Line Fh: A (δ =0.49 mm/s; ε = 0.00 mm/s; Bhf = 50.1 T) and B (δ = 0.42 mm/s; ε = -0.01 mm/s; Bhf = 46.8 T) 6-Line Fh: A (δ = 0.50 mm/s; ε = -0.03 mm/s; Bhf = 50.2 T) and B (δ = 0.40 mm/s; ε = -0.05 mm/s; Bhf = 47.1 T). We interpret the two sextets to be due to either differences in the coordination environment of iron, i.e., in tetrahedral or octahedral sites, the presence of a disordered surface phase, or a combination of both.
How to cite this dataset:
Byrne, J., Kappler, A., 2022. A revised analysis of ferrihydrite at liquid helium temperature using Mössbauer spectroscopy, Version 1.0. Interdisciplinary Earth Data Alliance (IEDA).
https://doi.org/10.26022/IEDA/112329. Accessed 2024-07-26.
DOI Creation Date:
2022-06-21
Related
Publication(s):
Byrne J.M., Kappler A., (2022), "A revised analysis of ferrihydrite at liquid helium temperature using Mössbauer spectroscopy". American Mineralogist.
License:
Creative Commons Attribution-ShareAlike 4.0 International [CC-BY-SA-4.0]
Funding source(s):
National Science Foundation:
9912359 National Science Foundation:
9911418Keyword(s):
Coverage Scope: Other
User Contributed Keyword(s):
2-line ferrihydrite, 6-line ferrihydrite, iron oxide, Moessbauer, fitting, parameters, hyperfine field
Data Available On:
2022-06-22