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.



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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