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Hyperfiltration-induced fractionation of lithium isotopes in geologic systems. Progress report, April 1, 1991--December 1, 1991 [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
27 pages : digital, PDF file
Additional Creators
Purdue University. Department of Earth and Atmospheric Sciences, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Effective modeling of hyperfiltration-induced fractionation of lithium isotopes is hindered by a lack of data on aqueous diffusion coefficients of ⁶Li⁺ and ⁷Li⁺. Several experiments were conducted this past year on yielded a value for the ratio of diffusion coefficients between {sup D6}Li+Cl−/{sup D7}Li+Cl−. A 0.9450 M LiCl solution was placed within sealed dialysis tubing and osmoted against a kilogram of deionized water at 22C. Osmotic equilibrium occurred at 143 minutes, and the ratio of ω⁶Li⁺Cl−/ω⁷Li+Cl− was measured to be 1.011. Because this experimental value is close to the square root of the mass ratio between ⁷LiCl and ⁶LiCl (1.012), Graham`s Law may be a convenient way to calculate such ratios for aqueous diffusion coefficients of individual isotopic components. In evolution of this closed-system osmotic cell as a function of time, Li isotopic ratios of beaker and bag solutions exhibit a minimum and a maximum before the ⁶Li/⁷Li ratios of both solutions assume the inevitable asymptotic approach toward isotopic equilibrium. Max difference in ⁶Li/⁷Li ratio between beaker and bag solution was 0.00156 ± 0.00015.
Report Numbers
E 1.99:doe/er/14113--2
doe/er/14113--2
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
01/01/1992.
"doe/er/14113--2"
"DE94003168"
"KC0403020"
Fritz, S.J.
Type of Report and Period Covered Note
Annual; 12/31/1991 - 12/31/1991
Funding Information
FG02-90ER14113
View MARC record | catkey: 14395454