Uranium-phosphate biomineralisation experiment: TEM images (a, b, c), k3 weighted EXAFS data (d), non-phase shift corrected Fourier transform of EXAFS data (e) and XRD spectra (f).

Dashed lines in XAS spectra represent the best fit of the data. * are peaks from uranyl phosphates (S6 Fig shows the peak pattern). Experiments were conducted in an anaerobic freshwater minimal medium with glycerol phosphate as the electron donor and both fumarate and U(VI) as electron acceptors. Results confirmed the precipitate to be a uranyl phosphate biomineral of the autunite group.