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Figure 4
X-ray emission spectra of Fe Kβ collected from a single crystal of magnesiowüstite-(Mg0.75,Fe0.25)O at high pressures. The spectrum under ambient conditions was measured outside the DAC. The spectra were normalized to unity and shifted in energy to compensate for the pressure-induced shift of the line maximum based on the main fluorescence peak (Kβ) at 7058 eV. The presence of the satellite peak ([K_\beta^\prime]) at 0, 21, 47 GPa and 300 K is characteristic of the high-spin state of iron whereas the disappearance of the satellite peak at 72 and 79 GPa indicates the occurrence of the low-spin state of ferrous iron in (Mg0.75,Fe0.25)O (Lin, Struzhkin et al., 2005BB18).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 12| Part 5| August 2005| Pages 637-641
doi:10.1107/S0909049505020741
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