Journal
PHYSICAL REVIEW LETTERS
Volume 84, Issue 8, Pages 1720-1723Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.1720
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The density of epsilon-iron has been calculated at pressures and temperatures up to 300 GPa and 1300 K, respectively. We observe epsilon to beta phase transition at pressures between 135 and 300 GPa and temperature above 1350 K; the pattern can be interpreted in terms of double hexagonal close-packed structure. The density calculated at high pressure and temperature (330-360 GPa and 5000-7000 K) closely matches with preliminary reference Earth model density, thereby imposing constraint on the composition of the Earth's inner core.
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