Formation of hydroxysulphate and hydroxycarbonate green rusts in the presence 
of zinc using time-resolved in situ small and wide angle X-ray scattering

Ahmed, I. A. M.; Shaw, S.; Benning, Liane G.

doi:10.1180/minmag.2008.072.1.159

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Formation of hydroxysulphate and hydroxycarbonate green rusts in the presence of zinc using time-resolved in situ small and wide angle X-ray scattering

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Ahmed, I. A. M.
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Shaw, S.
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Benning, Liane G.
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Ahmed, I. A. M., Shaw, S., Benning, L. G. (2008): Formation of hydroxysulphate and hydroxycarbonate green rusts in the presence of zinc using time-resolved in situ small and wide angle X-ray scattering. - Mineralogical Magazine, 72, 1, 159-162.
https://doi.org/10.1180/minmag.2008.072.1.159

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_806895

Abstract

The formation and transformation of hydroxysulphate (GRSO(4)) and hydroxycarbonate (GRCO(3)) Green Rust, were studied ill situ using synchrotron-based time-resolved small and wide angle X-ray scattering. The time-resolved data revealed, for the first time, the pH dependent transition from poorly-ordered schwertmannite (pH <6.5) into GRSO(4) (pH similar to 6.8) followed by GRCO(3) (at PH similar to 9.6). These data also showed that the addition of Zn to the starting sulphate Fe2+/Fe3+ solution resulted in a change in size of the GR unit-cell due to substitution of Zn into the GR structure.