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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. http://resolver.caltech.edu/CaltechAUTHORS:20141022-145102241

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Abstract

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.


Item Type:Book Section
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http://dx.doi.org/10.1063/1.55518 DOIArticle
http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.55518PublisherArticle
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
Record Number:CaltechAUTHORS:20141022-145102241
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141022-145102241
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:http://dx.doi.org/10.1063/1.55518
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50695
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:23 Oct 2014 16:26
Last Modified:23 Oct 2014 16:26

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