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Shock temperatures and the melting point of iron

Ahrens, Thomas J. and Holland, Kathleen G. and Chen, George Q. (1998) Shock temperatures and the melting point of iron. In: Shock compression of condensed matter 1997. AIP conference proceedings. No.429. American Institute of Physics , Woodbury, NY, pp. 133-136. ISBN 1-56396-833-9.

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New measurements of the ratio of Fe to LiF and Al_2O_3 anvil thermal diffusivities are used to obtain revised shock temperatures for Fe. New results match Brown and McQueen’s (1) calculations of the temperatures of 5000 and 5800K at the 200 and 243 GPa transitions in Fe. New sound speed measurements along the Hugoniot of γ-Fe, centered at 1573K, demonstrate that this phase melts at ∼70 GPa and ∼2800 K and the γ phase does not occur above ∼93 GPa. At higher pressures, perhaps over the entire pressure range of the Earth’s molten outer core (132 to 330 GPa), the β (dhcp) phase, and not the ε phase, appears to be the solidus phase of pure Fe.

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Additional Information:© 1998 The American Institute of Physics. Published online 10 July 1998. Research supported by NSF. We appreciate the experimental support of E. Gelle and M. Long. Contribution #8484, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA.
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Caltech Division of Geological and Planetary Sciences8484
Series Name:AIP conference proceedings
Issue or Number:429
Record Number:CaltechAUTHORS:20141022-145102241
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Official Citation:Shock temperatures and the melting point of iron Ahrens, Thomas J. and Holland, Kathleen G. and Chen, George Q., AIP Conference Proceedings, 429, 133-136 (1998), DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50695
Deposited By: Tony Diaz
Deposited On:23 Oct 2014 16:26
Last Modified:10 Nov 2021 18:59

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