Sound velocities and density measurements of solid hcp-Fe and hcp-Fe-Si(9wt.%) alloy at high pressure: Constraints on the Si abundance in the Earth’s inner core

Daniele Antonangeli1, Guillaume Morard1, Luigi Paolasini2, Gaston Garbarino2, Caitlin A Murphy3, Eric Edmund1, Frederic Decremps1, Guillaume Fiquet1, Alexei Bosak2, Mohamed Mezouar2 and Yingwei Fei4, (1)CNRS - Sorbonne Universités, IMPMC, Paris, France, (2)ESRF European Synchrotron Radiation Facility, Grenoble, France, (3)Geophysical Laboratory, Washington Dc, DC, United States, (4)Carnegie Inst of Washington, Washington, DC, United States