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Enthalpies of Formation of Rare Earth and Actinide(III) Hydroxides; their Acid-Base Relationships and Estimation of their Thermodynamic Properties

Published online by Cambridge University Press:  25 February 2011

Lester R. Morss  and
Clayton W. Williams
Lester R. Morss
Affiliation:
Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439, U.S.A
Clayton W. Williams
Affiliation:
Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439, U.S.A
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Abstract

This paper reviews the literature on rare earth(III) and actinide(III) hydroxide thermodynamics, in particular the determination of their enthalpies of formation at 25 ºC. The hydroxide unit-cell volumes, lanthanide/actinide ion sizes, and solid-solution stability trends have been correlated with a generalized acid-base strength model for oxides to estimate properties for heterogeneous equilibria that are relevant to nuclear waste modeling and to characterization of potential actinide environmental interactions. Enthalpies of formation and solubility-product constants of actinide(III) hydroxidesare estimated

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 257: Symposium – Scientific Basis for Nuclear Waste Management XV , 1991 , 283
Copyright
Copyright © Materials Research Society 1992

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References

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