Journal
PHYSICAL REVIEW B
Volume 87, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.024302
Keywords
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Funding
- Carnegie Institution of Washington
- Carnegie DOE Alliance Center
- University of Nevada, Las Vegas
- Lawrence Livermore National Laboratory through the Department of Energy (DOE)-National Nuclear Security Administration, DOE-Basic Energy Sciences
- National Science Foundation (NSF)
- US DOE, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- Consortium for Materials Properties Research in Earth Sciences
- NSF Grant [EAR-1214376]
- [NSF-EAR-0738852]
- Division Of Earth Sciences
- Directorate For Geosciences [1214376] Funding Source: National Science Foundation
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We measured viscosity of KCl and NaCl liquids up to 7.3 GPa and observed a clear discontinuity in the pressure dependence of viscosity for liquid KCl at around 2 GPa. The viscosity of liquid KCl increased rapidly at 1.5-2.2 GPa, above which it remained virtually constant. Structural data of KCl liquid also showed a pronounced change signified by the ratio r(2)/r(1), where r(1) and r(2) are the nearest- and the second-neighbor distances, respectively. In contrast, both viscosity and the r(2)/r(1) ratio changed linearly with pressure for liquid NaCl. Our observation suggests that viscosities of KCl and NaCl liquids strongly correlate with the structural changes in terms of the r(2)/r(1) ratio. The viscosity anomaly in liquid KCl is found to be at pressures close to that of the B1-B2 transition in solid KCl. DOI: 10.1103/PhysRevB.87.024302
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