Direct Observations of a Dynamically Driven Phase Transition with in situ X-Ray Diffraction in a Simple Ionic Crystal
Journal Article
·
· Physical Review Letters
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Washington State Univ., Argonne, IL (United States)
- Univ. of Nevada, Las Vegas, NV (United States)
- Carnegie Institute of Washington, Argonne, IL (United States)
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.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1421646
- Alternate ID(s):
- OSTI ID: 1513722
OSTI ID: 1414515
OSTI ID: 1416576
- Report Number(s):
- SAND--2018-0578J; 660051
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 119; ISSN 0031-9007; ISSN PRLTAO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Polycapillary x-ray lenses for single-shot, laser-driven powder diffraction
|
journal | October 2018 |
Direct observation of the hcp-bcc phase transition and melting along the principal Hugoniot of Mg
|
journal | January 2020 |
Nanosecond Melting and Recrystallization in Shock-Compressed Silicon
|
journal | September 2018 |
Structural Transformation and Melting in Gold Shock Compressed to 355 GPa
|
journal | July 2019 |
Similar Records
Phase transitions and equations of state of alkaline earth fluorides CaF[subscript 2], SrF[subscript 2], and BaF[subscript 2] to Mbar pressures
Phase Transitions and Equations of State of Alkaline Earth Fluorides CaF2 SrF2 and BaF2 to Mbar Pressures
Journal Article
·
Mon Jun 14 00:00:00 EDT 2010
· Phys. Rev. B
·
OSTI ID:1002454
Phase Transitions and Equations of State of Alkaline Earth Fluorides CaF2 SrF2 and BaF2 to Mbar Pressures
Journal Article
·
Fri Dec 30 23:00:00 EST 2011
· Physical Review. B, Condensed Matter and Materials Physics
·
OSTI ID:1042119