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Iron corrosion in archaeological context: Structural refinement of the ferrous hydroxychloride β-Fe$_2$ (OH)$_3$ Cl

Abstract : Ferrous hydroxysalts are found in corrosion layers of archaeological ferrous objects extracted from oxygen-poor environments. The structure of synthetic and natural β-Fe$_2$ (OH)$_3$ Cl was investigated by X-ray absorption spectroscopy and X-ray diffraction. The local environments of Cl- and Fe$^{2+}$ were precisely determined showing the same structure around Cl- and Fe$^{2+}$ atoms whatever the natural or synthesized phase. The crystalline structure was refined confirming the rhombohedral unit cell and R-3m space group. However slight differences observed for the structural parameters and on XRD patterns suggested different crystallite size, strain effects and the influence of the crystallization process.
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https://hal-cea.archives-ouvertes.fr/cea-01635529
Contributor : Serge Palacin <>
Submitted on : Wednesday, November 15, 2017 - 11:59:51 AM
Last modification on : Wednesday, October 14, 2020 - 3:55:18 AM

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Solenn Reguer, François Mirambet, Céline Remazeilles, Delphine Vantelon, Florian Kergourlay, et al.. Iron corrosion in archaeological context: Structural refinement of the ferrous hydroxychloride β-Fe$_2$ (OH)$_3$ Cl. Corrosion Science, Elsevier, 2015, 100, pp.589. ⟨10.1016/j.corsci.2015.08.035⟩. ⟨cea-01635529⟩

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