The crystal structure of iron in the earth's inner core

Details The crystal structure of iron in the earth's inner core The crystal structure of iron in the earth's inner core

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990geoji.103..285s&link_type=abstract

Geophysical Journal International (ISSN 0955-419X), vol. 103, Oct. 1990, p. 285, 286.

Physics

4

Crystal Lattices, Earth Core, Hexagonal Cells, Iron, Planetary Composition, Anisotropy, Close Packed Lattices, Earth Planetary Structure, Geomagnetism, P Waves

Scientific paper

Seismic P-waves traveling in a N-S direction through the inner core of the earth are slightly faster than those traveling in the equatorial plane, and these results have been interpreted in terms of an anisotropic inner core with cylindrical symmetry aligned with the earth's axis of rotation. In this letter it is shown that this interpretation places an important constraint on the crystal structure of the inner core, and in particular is inconsistent with a cubic crystal structure (bcc or fcc). These results therefore provide further evidence for the stability of the hcp phase of iron under the earth's core conditions.

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