Solid-solute phase equilibria in aqueous solution. III. A new application of an old chemical potentiometer
Königsberger, E. and Gamsjäger, H. (1990) Solid-solute phase equilibria in aqueous solution. III. A new application of an old chemical potentiometer. Marine Chemistry, 30 . pp. 317-327.
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Incongruent dissolution of mixed crystals leading to a stable thermodynamic equilibrium as well as congruent dissolution leading to a metastable equilibrium termed ‘stoichiometric saturation’ are governed by the same principles of phase theory, when in the latter case the constraint of constant composition of the solid phase is taken into consideration.
A simple galvanic cell was used as chemical potentiometer and it was found that reliable thermodynamic data can be obtained on one-component phase transitions such as aragonite → calcite as well as on ‘stoichiometrically saturated’ homogeneous solid mixtures of Co-Mn carbonates. With this method data for modelling the solubility behavior of solid solutions become accessible.
|Publication Type:||Journal Article|
|Copyright:||© 1990 Published by Elsevier B.V.|
|Notes:||Presented at the section on Atmospheric and Marine Chemistry of the 32nd IUPAC Congress in Stockholm, Sweden, August 2–7, 1989.|
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