Melting of Copper and Nickel at High Pressure; the Role of d-Electrons

HR: 1340h
AN: MR13A-0068 [Abstracts]
TI: Melting of Copper and Nickel at High Pressure; the Role of d-Electrons
AU: * Japel, S
EM: japel@mpch-mainz.mpg.de
AF: Max Planck Institut f〉 Chemie, Postfach 3060, Mainz, D-55020 Germany
AU: Schwager, B
EM: schwager@mpch-mainz.mpg.de
AF: Max Planck Institut f〉 Chemie, Postfach 3060, Mainz, D-55020 Germany
AU: Boehler, R
EM: boe@mpch-mainz.mpg.de
AF: Max Planck Institut f〉 Chemie, Postfach 3060, Mainz, D-55020 Germany
AU: Ross, M
EM: ross7@llnl.gov
AF: Lawrence Livermore National Laboratory, University of California, Livermore, CA 94551 United States
AB: Understanding the behavior of the elements under extreme conditions of pressure and temperature can lead to valuable information about the planetary interiors, including melt formation and viscosity. In this study, melting curves of Cu and Ni were measured in the laser-heated diamond cell to 97 GPa (3800 K) and 60 GPa (2970 K), respectively. The temperatures of Cu are in good agreement with recent theoretical calculations. The Cu melting slope (dT/dP) is about 2.5 times steeper than for Ni. The present results confirm the key role d-shell electrons play in determining the temperature dependence of high pressure melting curves in transition metals that have filled or partially filled d-electron bands.
DE: 1099 General or miscellaneous
DE: 3699 General or miscellaneous
DE: 3924 High-pressure behavior
DE: 3999 General or miscellaneous
SC: Mineral and Rock Physics [MR]
MN: Fall Meeting 2005