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 Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000; NA-0003525; NA0002442; NA0001974; FG02-99ER45775; AC02-06CH11357; NA0001982
- OSTI ID:
- 1421646
- Alternate ID(s):
- OSTI ID: 1414515
- Report Number(s):
- SAND-2018-0578J; PRLTAO; 660051; TRN: US1801540
- Journal Information:
- Physical Review Letters, Vol. 119, Issue 25; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 16 works
Citation information provided by
Web of Science
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