Aggregate sound velocities and acoustic Gruneisen parameter of iron up to 300 GPa and 1,200 K

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.