Near-critical coexistence curve and critical exponent of an ionic fluid

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · Journal of Chemical Physics; (USA)

DOI:https://doi.org/10.1063/1.458263· OSTI ID:6880140

Singh, R R; Pitzer, K S ^[1]

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1. Department of Chemistry, University of California, Berkeley, CA (USA) Lawrence Berkeley Laboratory, University of California, Berkeley, CA (USA)

The coexistence curve of an ionice liquid--liquid system has been obtained very close to the critical point by measuring the refractive indices of the two phases in equilibrium. The effective exponent {beta}{sub {ital e}} remains close to the classical value of 0.5 to {ital t}=0.0005 or closer to {ital T}{sub {ital c}}. The data are, however, not inconsistent with a limiting exponent of 0.326 provided the Wegner correction terms are very large. This behavior is qualitatively consistent with available theory and other experimental knowledge, but further theory and experiments are needed before quantitative comparisons can be made.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6880140
• Journal Information: Journal of Chemical Physics; (USA), Journal Name: Journal of Chemical Physics; (USA) Vol. 92:11; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
AMMONIUM COMPOUNDS
BORIDES
BORON COMPOUNDS
CRITICAL TEMPERATURE
FLUIDS
IONIC COMPOSITION
LIQUIDS
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHYSICAL PROPERTIES
REFRACTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE