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Figure 7
Plot of the Birch-normalized pressure (F) against Eulerian strain (f) for the Fe0.93O and (Mg0.73Fe0.27)O crystals. The plot visually confirms that K′ is close to 4 for both Fe0.93O phases. K′ was allowed to refine in the (Mg,Fe)O data set, yielding 4.0 (±0.1). The values of V0 used to calculate the F–f plot were determined experimentally for (Mg0.73Fe0.27)O (V0 = 77.30 ± 0.02 Å3) and cubic Fe0.93O (V0 = 79.40 ± 0.04 Å3), and were taken from the fitted equation of state for the rhombohedral phase of Fe0.93O (V0 = 59.72 ± 0.22 Å3).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 12| Part 5| August 2005| Pages 577-583
doi:10.1107/S0909049505022326
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