Fig. 1
From: Altered chemistry of oxygen and iron under deep Earth conditions
Representative XAS and XRS spectra of iron oxide compounds. a PFY-XAS spectra at Fe K-edge of iron oxide compounds at room temperature. Black, olive, blue, and cyan lines: Fe0, Fe2+O, Fe3+2O3, and CaFe4+O3 at ambient conditions, respectively; light and dark magenta lines: Py-FeO2 at 53 and 81 GPa, respectively; red line: Py-FeO2Hx at 133 GPa; gray arrow: the link from the dashed outline to the inset. Inset: the area zoomed for the dashed outline in Fig. 1a. b XRS spectra of Py-FeO2Hx at 110 GPa. Circles: experimental data; shaded areas: fitted peaks
