Phase Diagram of Iron, Revised-Core Temperatures

Journal Article · Wed Jan 27 00:00:00 EST 1999 · Geophysical Research Letter

OSTI ID:3228

Ahrens, T J; Chen, G Q; Holland, K G

Shock-wave experiments on iron preheated to 1,573 K conducted from 14 to 73 GPa, yield new data for sound velocities of the {gamma}- and liquid-phases. Melting was observed in the highest pressure ({approximately} 71 {+-} 2 GPa) experiments at calculated shock temperatures of 2,775 {+-} 160 K. This single crossing of the {gamma}-liquid boundary measured here agrees closely with the {gamma}-iron melting line determined by Boehler [1993], Saxena et al. [1993], and Jephcoat and Besedin [1997]. This {gamma}-iron melting curve is {approximately} 300 C lower than that of Shen et al. [1998b] at 80 GPa.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 3228
• Report Number(s): SAND99-0219J; TRN: AH200112%%295
• Journal Information: Geophysical Research Letter, Other Information: Submitted to Geophysical Research Letter; PBD: 27 Jan 1999
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
IRON
MELTING
PHASE DIAGRAMS
TEMPERATURE RANGE 1000-4000 K
VERY HIGH PRESSURE
EARTH CORE