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. Author manuscript; available in PMC: 2020 Oct 5.
Published in final edited form as: Chem Geol. 2019 Jul 8;524:345–355. doi: 10.1016/j.chemgeo.2019.07.007

Figure 1.

Figure 1.

Surface Oxidation states of U 4f in unreacted and reacted Jackpile mine ore samples A) High resolution XPS spectra of U in unreacted ore B) High resolution XPS spectra of U in ore reacted with 10 mM HCO3− C) High resolution XPS spectra of U in ore reacted with 6% NaOCl D) High resolution XPS spectra of U in ore reacted with 6% NaOCl + 10mM HCO3−. E) Reference XPS spectra for U(IV) using uraninite [UO2] F) Reference XPS spectra for U(VI) using becquerelite [Ca(UO2)6O4(OH)6·8(H2O)]