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Fig. 6. Phosphorus K-XANES spectra with an inset of the white-line region (a) and the pre-edge region of XANES spectra (b) for moist samples collected at various times from an abiotic reduction experiment on a suspension containing 1:1 by mass ferrihydrite/boehmite and 750 mmol P kg–1 total solids. Spectra for standards of PO4 adsorbed on boehmite (500 mmol kg–1) or ferrihydrite (1000 mmol kg–1) and noncrystalline (non-xl) Al(III)- and Fe(III)-phosphate are included.
