What does this research mean for the field?

Fe2+ predominantly resides in the octahedral O sheet of trioctahedral micas, while Fe3+ can be found in both octahedral M sites and tetrahedral T sites, with distinct variations in local environments affecting their spectral features. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

The research aims to analyze the distribution of Fe in micas and correlate it with structural refinements.

March 5, 2026Open Access

Local and average Fe distribution in trioctahedral micas: Analysis of Fe K-edge XANES spectra in the phlogopite-annite and phlogopite-tetra-ferriphlogopite joins on the basis of single-crystal XRD refinements

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Authors

BFBrigatti Franca CGCibin G.GGGiuli G.

Discussion

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Overview

Analysis uncovers local and average Fe distribution in micas, indicating relationship between structure and absorption features.

Key Points

The research aims to analyze the distribution of Fe in micas and correlate it with structural refinements.
Recorded Fe K-edge absorption spectra of twelve micas.
Focused on three end members: phlogopite, annite, and tetra-ferriphlogopite.
Performed single-crystal X-ray diffraction refinements on the same rock sample.
Identified distinct trends in Fe2+ and Fe3+ coordination based on their local environments.
Bond distances from XANES spectra align well with those from X-ray diffraction.
Variations in order levels among micas revealed insights into their structural complexities.

Cite This Study

Franca et al. (2002) studied this question.

synapsesocial.com/papers/69a91e65d6127c7a504c24fd https://doi.org/10.15161/oar.it/s5fmc-aav85

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March 5, 2026Open Access

Local and average Fe distribution in trioctahedral micas: Analysis of Fe K-edge XANES spectra in the phlogopite-annite and phlogopite-tetra-ferriphlogopite joins on the basis of single-crystal XRD refinements

View Full Paper

Ask AI

Bookmark

Authors

BFBrigatti Franca CGCibin G.GGGiuli G.

Discussion

Member takes

Overview

Analysis uncovers local and average Fe distribution in micas, indicating relationship between structure and absorption features.

Key Points

The research aims to analyze the distribution of Fe in micas and correlate it with structural refinements.
Recorded Fe K-edge absorption spectra of twelve micas.
Focused on three end members: phlogopite, annite, and tetra-ferriphlogopite.
Performed single-crystal X-ray diffraction refinements on the same rock sample.
Identified distinct trends in Fe2+ and Fe3+ coordination based on their local environments.
Bond distances from XANES spectra align well with those from X-ray diffraction.
Variations in order levels among micas revealed insights into their structural complexities.

Cite This Study

Franca et al. (2002) studied this question.

synapsesocial.com/papers/69a91e65d6127c7a504c24fd https://doi.org/10.15161/oar.it/s5fmc-aav85

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