Open AccessStructural Changes in Liquid Lithium under High Pressure
Author(s) -
Yu Shu,
Yoshio Kono,
Itaru Ohira,
Rostislav Hrubiak,
Curtis KenneyBenson,
Maddury Somayazulu,
Nenad Velisavljevic,
Guoyin Shen
Publication year - 2020
Publication title -
the journal of physical chemistry b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 392
eISSN - 1520-6106
pISSN - 1520-5207
DOI - 10.1021/acs.jpcb.0c05324
Subject(s) - lithium (medication) , diffraction , compression (physics) , isothermal process , structural change , toroid , volume (thermodynamics) , materials science , chemistry , thermodynamics , crystallography , analytical chemistry (journal) , composite material , plasma , optics , chromatography , physics , medicine , macroeconomics , quantum mechanics , economics , endocrinology
We have experimentally studied the effect of compression on the structure of liquid lithium (Li) by multiangle energy dispersive X-ray diffraction in a large-volume cupped-Drickamer-Toroidal cell. The structure factors, s ( q ), of liquid Li have been successfully determined under an isothermal compression at 600 ± 30 K and at pressures up to 11.5 GPa. The first peak position in s ( q ) is found to increase with increasing pressure and is showing an obvious slope change starting at ∼7.5 GPa. The slope change is interpreted as a structural change from bcc-like to fcc-like local ordering in liquid Li. At pressures above 8.7 GPa, the liquid Li becomes predominantly fcc-like up to the highest pressure of 11.5 GPa in this study. The observed structural changes in liquid Li are consistent with the recently determined melting curve of Li.
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