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Title: Structural Transformation and Melting in Gold Shock Compressed to 355 GPa

Abstract

Gold is believed to retain its ambient crystal structure at very high pressures under static and shock compression, enabling its wide use as a pressure marker. Our in situ x-ray diffraction measurements on shock-compressed gold show that it transforms to the body-centered-cubic (bcc) phase, with an onset pressure between 150 and 176 GPa. A liquid-bcc coexistence was observed between 220 and 302 GPa and complete melting occurs by 355 GPa. Our observation of the lower coordination bcc structure in shocked gold is in marked contrast to theoretical predictions and the reported observation of the hexagonal-close-packed structure under static compression.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
OSTI Identifier:
1574298
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 123; Journal Issue: 4
Country of Publication:
United States
Language:
English
Subject:
phase transitions; structure phase transistions

Citation Formats

Sharma, Surinder M., Turneaure, Stefan J., Winey, J. M., Li, Yuelin, Rigg, Paulo, Schuman, Adam, Sinclair, Nicholas, Toyoda, Y., Wang, Xiaoming, Weir, Nicholas, Zhang, Jun, and Gupta, Y. M. Structural Transformation and Melting in Gold Shock Compressed to 355 GPa. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.123.045702.
Sharma, Surinder M., Turneaure, Stefan J., Winey, J. M., Li, Yuelin, Rigg, Paulo, Schuman, Adam, Sinclair, Nicholas, Toyoda, Y., Wang, Xiaoming, Weir, Nicholas, Zhang, Jun, & Gupta, Y. M. Structural Transformation and Melting in Gold Shock Compressed to 355 GPa. United States. doi:10.1103/PhysRevLett.123.045702.
Sharma, Surinder M., Turneaure, Stefan J., Winey, J. M., Li, Yuelin, Rigg, Paulo, Schuman, Adam, Sinclair, Nicholas, Toyoda, Y., Wang, Xiaoming, Weir, Nicholas, Zhang, Jun, and Gupta, Y. M. Wed . "Structural Transformation and Melting in Gold Shock Compressed to 355 GPa". United States. doi:10.1103/PhysRevLett.123.045702.
@article{osti_1574298,
title = {Structural Transformation and Melting in Gold Shock Compressed to 355 GPa},
author = {Sharma, Surinder M. and Turneaure, Stefan J. and Winey, J. M. and Li, Yuelin and Rigg, Paulo and Schuman, Adam and Sinclair, Nicholas and Toyoda, Y. and Wang, Xiaoming and Weir, Nicholas and Zhang, Jun and Gupta, Y. M.},
abstractNote = {Gold is believed to retain its ambient crystal structure at very high pressures under static and shock compression, enabling its wide use as a pressure marker. Our in situ x-ray diffraction measurements on shock-compressed gold show that it transforms to the body-centered-cubic (bcc) phase, with an onset pressure between 150 and 176 GPa. A liquid-bcc coexistence was observed between 220 and 302 GPa and complete melting occurs by 355 GPa. Our observation of the lower coordination bcc structure in shocked gold is in marked contrast to theoretical predictions and the reported observation of the hexagonal-close-packed structure under static compression.},
doi = {10.1103/PhysRevLett.123.045702},
journal = {Physical Review Letters},
number = 4,
volume = 123,
place = {United States},
year = {2019},
month = {7}
}

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