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Title: The Principal Hugoniot of Forsterite to 950 GPa

Forsterite (Mg 2SiO 4) single crystals were shock compressed to pressures between 200 and 950 GPa using independent plate–impact steady shocks and laser–driven decaying shock compression experiments. Additionally, we performed density functional theory–based molecular dynamics to aid interpretation of the experimental data and to investigate possible phase transformations and phase separations along the Hugoniot. We show that the experimentally obtained Hugoniot cannot distinguish between a pure liquid Mg 2SiO 4 and an assemblage of solid MgO plus liquid magnesium silicate. In conclusion, the measured reflectivity is nonzero and increases with pressure, which implies that the liquid is a poor electrical conductor at low pressures and that the conductivity increases with pressure.
Authors:
ORCiD logo [1] ; ORCiD logo [1] ;  [2] ;  [1] ;  [1] ;  [3] ; ORCiD logo [3] ; ORCiD logo [3] ; ORCiD logo [2] ;  [1] ; ORCiD logo [2] ;  [4]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Univ. of California, Davis, CA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Harvard Univ., Cambridge, MA (United States)
Publication Date:
Report Number(s):
SAND-2018-4714J
Journal ID: ISSN 0094-8276; 663822
Grant/Contract Number:
AC04-94AL85000; AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 45; Journal Issue: 9; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1444087
Alternate Identifier(s):
OSTI ID: 1437053

Root, Seth, Townsend, Joshua P., Davies, Erik, Lemke, Raymond W., Bliss, David E., Fratanduono, Dayne E., Kraus, Richard G., Millot, Marius, Spaulding, Dylan K., Shulenburger, Luke, Stewart, Sarah T., and Jacobsen, Stein B.. The Principal Hugoniot of Forsterite to 950 GPa. United States: N. p., Web. doi:10.1029/2017GL076931.
Root, Seth, Townsend, Joshua P., Davies, Erik, Lemke, Raymond W., Bliss, David E., Fratanduono, Dayne E., Kraus, Richard G., Millot, Marius, Spaulding, Dylan K., Shulenburger, Luke, Stewart, Sarah T., & Jacobsen, Stein B.. The Principal Hugoniot of Forsterite to 950 GPa. United States. doi:10.1029/2017GL076931.
Root, Seth, Townsend, Joshua P., Davies, Erik, Lemke, Raymond W., Bliss, David E., Fratanduono, Dayne E., Kraus, Richard G., Millot, Marius, Spaulding, Dylan K., Shulenburger, Luke, Stewart, Sarah T., and Jacobsen, Stein B.. 2018. "The Principal Hugoniot of Forsterite to 950 GPa". United States. doi:10.1029/2017GL076931.
@article{osti_1444087,
title = {The Principal Hugoniot of Forsterite to 950 GPa},
author = {Root, Seth and Townsend, Joshua P. and Davies, Erik and Lemke, Raymond W. and Bliss, David E. and Fratanduono, Dayne E. and Kraus, Richard G. and Millot, Marius and Spaulding, Dylan K. and Shulenburger, Luke and Stewart, Sarah T. and Jacobsen, Stein B.},
abstractNote = {Forsterite (Mg2SiO4) single crystals were shock compressed to pressures between 200 and 950 GPa using independent plate–impact steady shocks and laser–driven decaying shock compression experiments. Additionally, we performed density functional theory–based molecular dynamics to aid interpretation of the experimental data and to investigate possible phase transformations and phase separations along the Hugoniot. We show that the experimentally obtained Hugoniot cannot distinguish between a pure liquid Mg2SiO4 and an assemblage of solid MgO plus liquid magnesium silicate. In conclusion, the measured reflectivity is nonzero and increases with pressure, which implies that the liquid is a poor electrical conductor at low pressures and that the conductivity increases with pressure.},
doi = {10.1029/2017GL076931},
journal = {Geophysical Research Letters},
number = 9,
volume = 45,
place = {United States},
year = {2018},
month = {4}
}

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