Ls. Dubrovinsky et al., Aggregate sound velocities and acoustic Gruneisen parameter of iron up to 300 GPa and 1,200 K, P NAS US, 98(17), 2001, pp. 9484-9489
Citations number
48
Categorie Soggetti
Multidisciplinary
Journal title
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Successful interpretation of available geophysical data requires experiment
al and theoretical information on the elasticity of solids under physical c
onditions of Earth's interior. Because iron is considered as major componen
t in Earth's core, elastic properties of iron at high pressures and tempera
tures are very important for modeling its composition and dynamics. We use
in situ x-ray diffraction data on e-iron at static pressures up to 300 GPa
and temperatures to 1,200 K to determine the Debye-Waller temperature facto
rs and calculate aggregate sound velocities and Gruneisen parameter of epsi
lon -iron by using an approach that is based on Rietveld refinement at high
pressures and temperatures.