XRD of shock-compressed Gibeon meteorite to 100 GPa
Abstract
Iron meteorites are core fragments from differentiated terrestrial planetesimals. The Gibeon meteorite is a differentiated iron meteorite that was discovered in 1836 and fell in Nambia, Africa. The FeNi7.9 composition exists in two phases: kamacite and taenite. In this work we use natural kamacite and taenite samples from the Gibeon meteorite a proxy for terrestrial core composition and examine the phase transition kinetics under shock compressed to 100 GPa. Using the Matter in Extreme Conditions (MEC) end-station at the Linac Coherent Light Source (LCLS), the 4th generation x-ray free electron laser (xFEL) at SLAC National Accelerator Laboratory, we collect in situ time-resolved XRD of natural kamacite and taenite transforming to high pressures structures with femtosecond temporal resolution.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFMMR33C0143T
- Keywords:
-
- 3924 High-pressure behavior;
- MINERAL PHYSICSDE: 3954 X-ray;
- neutron;
- and electron spectroscopy and diffraction;
- MINERAL PHYSICSDE: 3612 Reactions and phase equilibria;
- MINERALOGY AND PETROLOGYDE: 3621 Mantle processes;
- MINERALOGY AND PETROLOGY