Fig. 2
From: Altered chemistry of oxygen and iron under deep Earth conditions
Representative SMS spectra and hyperfine parameters. a High pressure Mössbauer spectra of FeO2Hx collected upon decompression at 300 K. Circles: experimental SMS spectra; red solid lines: modeled spectra using CONUSS program. Comparison of isomer shift (b) and quadrupole splitting (c) of iron in iron-rich compounds at high pressure and room temperature. Solid and half-filled diamonds: pyrite-structured FeO2Hx and FeO2, respectively, this study; open diamonds: pyrite FeS2 (ref. 29); solid squares: Fe2O3, this study; open squares: Fe2O3 (ref. 58); left-, right-, and top-pointing triangles: (Fe0.48Mg0.52)O (ref. 27), Fe0.94O (ref. 26), and (Fe0.25Mg0.75)O (ref. 28), respectively; dashed lines: linear fits to experimental data. The errors on the experimental data are ±2 SD, which are smaller than symbols and not shown for clarity
