Preparation and characterisation of tin-doped α-FeOOH (goethite)

Berry, Frank J.; Helgason, Örn; Bohórquez, Alberto; Marco, José F.; McManus, Julia; Moore, Elaine; Mørup, Steen and Wynn, Paul G. (2000). Preparation and characterisation of tin-doped α-FeOOH (goethite). Journal of Materials Chemistry, 10(7) pp. 1643–1648.

DOI: https://doi.org/10.1039/B001056L

Abstract

Tin-doped α-FeOOH (goethite) has been prepared directly by the hydrothermal processing of a precipitate. The morphology of the crystals, which is reflected in the ⁵⁷Fe Mössbauer spectra, depends on the pH of the precipitating media. The ¹¹⁹Sn Mössbauer spectra are consistent with a complex microstructure around the octahedrally coordinated tin ions in the goethite structure and are sensitive to the changes in the magnetic structure of α-FeOOH resulting from tin doping. ⁵⁷Fe Mössbauer spectroscopy and electron microscopy show acicular tin-doped α-FeOOH to be converted to tin-doped α-Fe₂O₃ with identical morphology by mild heating in air.

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