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Updated: Jan 11, 2026

Synthesis and Microdiffraction at Extreme Pressures and Temperatures
Published on: October 7, 2013
Body-Centered-Cubic Phase Transformation in Gold at TPa Pressures
Amy L Coleman1, Saransh Singh1, Tom E Lockard1
1Lawrence Livermore National Laboratory, Livermore, California, USA.
None:
In situ x-ray diffraction at both the National Ignition Facility and Omega-EP Laser Facility has been utilized to determine the crystallographic state of ramp and shock-ramp compressed gold up to 1.2 TPa (1 TPa=10 Mbar=10×10^{6} atmospheres). In this Letter, we describe a series of experiments that explore a variety of pressure-temperature states in Au, accessed using tailored laser pulses. We find that the ambient pressure face-centered-cubic phase is stable under ramp compression to pressures of at least 1 TPa where the body-centered-cubic phase is observed simultaneously.
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