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Title: Direct Observations of a Dynamically Driven Phase Transition with in situ X-Ray Diffraction in a Simple Ionic Crystal

Abstract

Here, we report real-time observations of a phase transition in the ionic solid CaF2, a model AB2 structure in high-pressure physics. Synchrotron x-ray diffraction coupled with dynamic loading to 27.7 GPa, and separately with static compression, follows, in situ, the fluorite to cotunnite structural phase transition, both on nanosecond and on minute time scales. Using Rietveld refinement techniques, we examine the kinetics and hysteresis of the transition. Our results give insight into the kinetic time scale of the fluorite-cotunnite phase transition under shock compression, which is relevant to a number of isomorphic compounds.

Authors:
 [1];  [1];  [1];  [2];  [2];  [3];  [3];  [4];  [4]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Washington State Univ., Argonne, IL (United States)
  3. Univ. of Nevada, Las Vegas, NV (United States)
  4. Carnegie Institute of Washington, Argonne, IL (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:
1421646
Alternate Identifier(s):
OSTI ID: 1414515
Report Number(s):
SAND-2018-0578J
Journal ID: ISSN 0031-9007; PRLTAO; 660051; TRN: US1801540
Grant/Contract Number:  
AC04-94AL85000; NA-0003525; NA0002442; NA0001974; FG02-99ER45775; AC02-06CH11357; NA0001982
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 25; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Kalita, Patricia E., Specht, Paul Elliot, Root, Seth, Sinclair, Nicholas, Schuman, Adam, White, Melanie, Cornelius, Andrew L., Smith, Jesse, and Sinogeikin, Stanislav. Direct Observations of a Dynamically Driven Phase Transition with in situ X-Ray Diffraction in a Simple Ionic Crystal. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.119.255701.
Kalita, Patricia E., Specht, Paul Elliot, Root, Seth, Sinclair, Nicholas, Schuman, Adam, White, Melanie, Cornelius, Andrew L., Smith, Jesse, & Sinogeikin, Stanislav. Direct Observations of a Dynamically Driven Phase Transition with in situ X-Ray Diffraction in a Simple Ionic Crystal. United States. doi:10.1103/PhysRevLett.119.255701.
Kalita, Patricia E., Specht, Paul Elliot, Root, Seth, Sinclair, Nicholas, Schuman, Adam, White, Melanie, Cornelius, Andrew L., Smith, Jesse, and Sinogeikin, Stanislav. Thu . "Direct Observations of a Dynamically Driven Phase Transition with in situ X-Ray Diffraction in a Simple Ionic Crystal". United States. doi:10.1103/PhysRevLett.119.255701. https://www.osti.gov/servlets/purl/1421646.
@article{osti_1421646,
title = {Direct Observations of a Dynamically Driven Phase Transition with in situ X-Ray Diffraction in a Simple Ionic Crystal},
author = {Kalita, Patricia E. and Specht, Paul Elliot and Root, Seth and Sinclair, Nicholas and Schuman, Adam and White, Melanie and Cornelius, Andrew L. and Smith, Jesse and Sinogeikin, Stanislav},
abstractNote = {Here, we report real-time observations of a phase transition in the ionic solid CaF2, a model AB2 structure in high-pressure physics. Synchrotron x-ray diffraction coupled with dynamic loading to 27.7 GPa, and separately with static compression, follows, in situ, the fluorite to cotunnite structural phase transition, both on nanosecond and on minute time scales. Using Rietveld refinement techniques, we examine the kinetics and hysteresis of the transition. Our results give insight into the kinetic time scale of the fluorite-cotunnite phase transition under shock compression, which is relevant to a number of isomorphic compounds.},
doi = {10.1103/PhysRevLett.119.255701},
journal = {Physical Review Letters},
number = 25,
volume = 119,
place = {United States},
year = {2017},
month = {12}
}

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Cited by: 4 works
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Figures / Tables:

FIG. 1 FIG. 1: Experimental Hugoniot data in the shock velocity (US) versus particle velocity (UP) plane, for five shots (two data points are overlapped). Five solid red stars (two are overlapped) represent CaF2 at 75% ± 1% TMD investigated in this work. Open symbols refer to literature data for CaF2 atmore » various initial densities [17,32,33].« less

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