Time-resolved synchrotron X-ray powder diffraction study of biogenic nanomagnetite

BELL, A. M. T,, COKER,, V. S., PEARCE, C. I., PATTRICK, R. A. D., VAN DER LAAN, G. and LLOYD, J. R. (2007). Time-resolved synchrotron X-ray powder diffraction study of biogenic nanomagnetite. Zeitschrift fur Kristallographie Crystalline Materials, 2007 (P2 S26), 423-428.

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Official URL: http://www.degruyter.com/view/j/zkri
Link to published version:: 10.1524/zksu.2007.2007.suppl_26.423


The bacterium Geobacter sulfurreducens can produce nanoparticulate magnetite (Fe3O4) by the reduction of amorphous Fe(III) oxyhydroxide coupled to the oxidation of organic matter in the anoxic subsurface as an alternative to oxygen respiration. G. sulfurreducens can transfer electrons to solid Fe(III)-bearing minerals through either direct contact between the cell and the mineral surface or by using an electron shuttling compound. High resolution synchrotron X-ray powder diffraction has been used to study samples taken at different stages of this reaction. This shows that an initial amorphous phase first transforms to goethite (FeO(OH)), before undergoing a further transformation to magnetite. Magnetite is formed faster in the presence of the electron shuttling compound disodium anthraquinone 2,6 disulphonate.

Item Type: Article
Additional Information: Conference proceedings from the 2006 European Powder Diffraction Conference (EPDIC 10) in Geneva, Switzerland.
Identification Number: 10.1524/zksu.2007.2007.suppl_26.423
Depositing User: Anthony Bell
Date Deposited: 28 Jul 2016 14:07
Last Modified: 28 Jul 2016 14:07
URI: http://shura.shu.ac.uk/id/eprint/12767

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