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Title: Oxygen Quadclusters in SiO 2 Glass above Megabar Pressures up to 160 GPa Revealed by X-Ray Raman Scattering

Abstract

As oxygen may occupy a major volume of oxides, a densification of amorphous oxides under extreme compression is dominated by reorganization of oxygen during compression. X-ray Raman scattering (XRS) spectra for SiO2 glass up to 1.6 Mbar reveal the evolution of heavily contracted oxygen environments characterized by a decrease in average O-O distance and the potential emergence of quadruply coordinated oxygen (oxygen quadcluster). Our results also reveal that the edge energies at the centers of gravity of the XRS features increase linearly with bulk density, yielding the first predictive relationship between the density and partial density of state of oxides above megabar pressures. The extreme densification paths with densified oxygen in amorphous oxides shed light upon the possible existence of stable melts in the planetary interiors.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [3]
  1. Seoul National Univ. (Korea, Republic of). School of Earth and Environmental Sciences and Inst. of Applied Physics
  2. Seoul National Univ. (Korea, Republic of). School of Earth and Environmental Sciences
  3. Argonne National Lab. (ANL), Argonne, IL (United States). X-Ray Science Division, High Pressure Collaborative Access Team (HPCAT)
  4. Carnegie Inst. of Science, Washington, DC (United States). Geophysical Lab.
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Science (NA-113); National Research Foundation of Korea (NRF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; Samsung Science and Technology Foundation (SSTF)
OSTI Identifier:
1608996
Alternate Identifier(s):
OSTI ID: 1577409
Grant/Contract Number:  
AC02-06CH11357; FG02-99ER45775; BA1401-07
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 123; Journal Issue: 23; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Lee, Sung Keun, Kim, Yong-Hyun, Yi, Yoo Soo, Chow, Paul, Xiao, Yuming, Ji, Cheng, and Shen, Guoyin. Oxygen Quadclusters in SiO2 Glass above Megabar Pressures up to 160 GPa Revealed by X-Ray Raman Scattering. United States: N. p., 2019. Web. https://doi.org/10.1103/PhysRevLett.123.235701.
Lee, Sung Keun, Kim, Yong-Hyun, Yi, Yoo Soo, Chow, Paul, Xiao, Yuming, Ji, Cheng, & Shen, Guoyin. Oxygen Quadclusters in SiO2 Glass above Megabar Pressures up to 160 GPa Revealed by X-Ray Raman Scattering. United States. https://doi.org/10.1103/PhysRevLett.123.235701
Lee, Sung Keun, Kim, Yong-Hyun, Yi, Yoo Soo, Chow, Paul, Xiao, Yuming, Ji, Cheng, and Shen, Guoyin. Thu . "Oxygen Quadclusters in SiO2 Glass above Megabar Pressures up to 160 GPa Revealed by X-Ray Raman Scattering". United States. https://doi.org/10.1103/PhysRevLett.123.235701. https://www.osti.gov/servlets/purl/1608996.
@article{osti_1608996,
title = {Oxygen Quadclusters in SiO2 Glass above Megabar Pressures up to 160 GPa Revealed by X-Ray Raman Scattering},
author = {Lee, Sung Keun and Kim, Yong-Hyun and Yi, Yoo Soo and Chow, Paul and Xiao, Yuming and Ji, Cheng and Shen, Guoyin},
abstractNote = {As oxygen may occupy a major volume of oxides, a densification of amorphous oxides under extreme compression is dominated by reorganization of oxygen during compression. X-ray Raman scattering (XRS) spectra for SiO2 glass up to 1.6 Mbar reveal the evolution of heavily contracted oxygen environments characterized by a decrease in average O-O distance and the potential emergence of quadruply coordinated oxygen (oxygen quadcluster). Our results also reveal that the edge energies at the centers of gravity of the XRS features increase linearly with bulk density, yielding the first predictive relationship between the density and partial density of state of oxides above megabar pressures. The extreme densification paths with densified oxygen in amorphous oxides shed light upon the possible existence of stable melts in the planetary interiors.},
doi = {10.1103/PhysRevLett.123.235701},
journal = {Physical Review Letters},
number = 23,
volume = 123,
place = {United States},
year = {2019},
month = {12}
}

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Cited by: 3 works
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    Works referencing / citing this record:

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