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Title: X-ray diffraction of solid tin to 1.2 TPa

Journal Article · · Physical Review Letters
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. The Univ. of Edinburgh, Edinburgh (United Kingdom)

In this study, we report direct in situ measurements of the crystal structure of tin between 0.12 and 1.2 TPa, the highest stress at which a crystal structure has ever been observed. Using angle-dispersive powder x-ray diffraction, we find that dynamically compressed Sn transforms to the body-centered-cubic (bcc) structure previously identified by ambient-temperature quasistatic-compression studies and by zero-kelvin density-functional theory predictions between 0.06 and 0.16 TPa. However, we observe no evidence for the hexagonal close-packed (hcp) phase found by those studies to be stable above 0.16 TPa. Instead, our results are consistent with bcc up to 1.2 TPa. We conjecture that at high temperature bcc is stabilized relative to hcp due to differences in vibrational free energy.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1249158
Alternate ID(s):
OSTI ID: 1210005
Report Number(s):
LLNL-JRNL-673348; PRLTAO
Journal Information:
Physical Review Letters, Vol. 115, Issue 7; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 45 works
Citation information provided by
Web of Science

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Cited By (9)

Equation of state of iron under core conditions of large rocky exoplanets journal April 2018
Phase transition lowering in dynamically compressed silicon journal September 2018
Zero-Kelvin Compression Isotherms of the Elements 1 ≤ Z ≤ 92 to 100 GPa journal December 2016
X-ray diffraction of ramp-compressed aluminum to 475 GPa journal August 2018
Optimized x-ray sources for x-ray diffraction measurements at the Omega Laser Facility journal December 2019
Coordination changes in liquid tin under shock compression determined using in situ femtosecond x-ray diffraction journal December 2019
Improved embedded-atom model potentials of Pb at high pressure: application to investigations of plasticity and phase transition under extreme conditions journal November 2018
Short-wavelength free-electron laser sources and science: a review text January 2017
Short-wavelength free-electron laser sources and science: a review journal October 2017