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Solubility of aluminum in the presence of hydroxide, fluoride, and sulfate

January 1, 1969

The total concentration of aqueous dissolved species of aluminum that will be present in equilibrium with microcrystalline gibbsite at various levels of complexing ligand concentration are shown graphically. The graphs can be used to estimate aluminum solubility, at 25?C and 1 atmosphere total pressure, when the pH of the solution, its ionic strength, and the total sulfate and fluoride concentrations are known. The standard free energy of formation of cryolite calculated from solubility experiments is --745.4 ? 1.0 kcal per mole at 25?C. Diagrams are included showing the solubility of cryolite in terms of aluminum, fluoride, and sodium concentrations. The stability fields of cryolite and microcrystalline gibbsite and their solubilities also are shown on pH-[F] diagrams.

Publication Year 1969
Title Solubility of aluminum in the presence of hydroxide, fluoride, and sulfate
DOI 10.3133/wsp1827C
Authors Charles Elmer Roberson, John David Hem
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Water Supply Paper
Series Number 1827
Index ID wsp1827C
Record Source USGS Publications Warehouse
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