Accurate XANES determination of microscale Fe redox state in clinopyroxene: A multivariate approach with polarization-dependent Fe K -edge XAFS

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Analysis reveals accurate estimation of Fe redox states in clinopyroxene, suggesting multivariate approach can enhance mineral studies.

X-ray absorption analysis accurately determines Fe redox states in clinopyroxene samples.
Results indicate successful predictions of Fe3+ concentration with ±7.8% error across orientations.
Multivariate analysis incorporates full X-ray absorption fine structure for improved estimations of Fe ratios.
Findings highlight the complexity of X-ray absorption anisotropy in mineralogy, calling for advanced modeling techniques.

Ito et al. (2025) studied this question.

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