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Title: Recent research on stishovite: Hugoniot and partial release Z experiments and DFT EOS calculations

Abstract

We have conducted a series of ride-along experiments on the Z facility to ascertain the Hugoniot of silica centered in the stishovite phase over a range 0.4 - 1.0 TPa, together with partial release states produced at the interface between the sample and a fused silica window. The stishovite samples were synthesized in a large-volume multi-anvil press at 15 GPa and 1773 K, with an initial density of 4.29 gm/cc. The new Z experiments on stishovite fill in a gap between gas gun experiments and NIF experiments. The states are compared with the Hugoniots of quartz and fused silica for inferences as to EOS. They are generally consistent with Sesame 7360 predictions. Sound speed constraints from these data are discussed. The new Hugoniot data cross over the melting curve of stishovite; together with the partial-release data and predictions from density-functional theory modeling, they provide insights into the properties of solid and liquid under extreme conditions. These data are fundamentally important for understanding the interior of silicate-based super-Earths.

Authors:
 [1];  [1];  [1];  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Carnegie Inst. of Washington, Washington, DC (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1434410
Report Number(s):
SAND-2018-4080
662407
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Furnish, Michael D., Shulenburger, Luke, Desjarlais, Michael, and Fei, Yingwei. Recent research on stishovite: Hugoniot and partial release Z experiments and DFT EOS calculations. United States: N. p., 2018. Web. doi:10.2172/1434410.
Furnish, Michael D., Shulenburger, Luke, Desjarlais, Michael, & Fei, Yingwei. Recent research on stishovite: Hugoniot and partial release Z experiments and DFT EOS calculations. United States. doi:10.2172/1434410.
Furnish, Michael D., Shulenburger, Luke, Desjarlais, Michael, and Fei, Yingwei. Sun . "Recent research on stishovite: Hugoniot and partial release Z experiments and DFT EOS calculations". United States. doi:10.2172/1434410. https://www.osti.gov/servlets/purl/1434410.
@article{osti_1434410,
title = {Recent research on stishovite: Hugoniot and partial release Z experiments and DFT EOS calculations},
author = {Furnish, Michael D. and Shulenburger, Luke and Desjarlais, Michael and Fei, Yingwei},
abstractNote = {We have conducted a series of ride-along experiments on the Z facility to ascertain the Hugoniot of silica centered in the stishovite phase over a range 0.4 - 1.0 TPa, together with partial release states produced at the interface between the sample and a fused silica window. The stishovite samples were synthesized in a large-volume multi-anvil press at 15 GPa and 1773 K, with an initial density of 4.29 gm/cc. The new Z experiments on stishovite fill in a gap between gas gun experiments and NIF experiments. The states are compared with the Hugoniots of quartz and fused silica for inferences as to EOS. They are generally consistent with Sesame 7360 predictions. Sound speed constraints from these data are discussed. The new Hugoniot data cross over the melting curve of stishovite; together with the partial-release data and predictions from density-functional theory modeling, they provide insights into the properties of solid and liquid under extreme conditions. These data are fundamentally important for understanding the interior of silicate-based super-Earths.},
doi = {10.2172/1434410},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {4}
}

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