The solubility of calcite, strontianite and witherite in NaCl solutions at 25°C

Frank J Millero, Peter J. Milne, Valerie L. Thurmond

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Abstract

The solubility of CaCO3 (calcite), SiCO3 (strontianite), and BaCO3 (witherite) has been determined in NaCl solutions from 0.1 to 6 m at 25°C. Activity coefficients estimated from Pitzer's equations with higher order interaction terms (θ and Ψ) were used to extrapolate the results to infinite dilution. Thermodynamic values of pKsp = 8.46 ± 0.03,9.13 ± 0.03 and 8.56 ± 0.04 were found, respectively, for CaCO3, SrCO3 and BaCO3 at 25°C. These results are in reasonable agreement with literature data. Since Pitzer parameters for the interactions of CO3 2- with Ca2+, Sr2+ and Ba2+ were not used, our results indicate that they are not necessary at low values of Pco2.

Original languageEnglish (US)
Pages (from-to)1141-1143
Number of pages3
JournalGeochimica et Cosmochimica Acta
Volume48
Issue number5
DOIs
StatePublished - 1984

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activity coefficient
Calcium Carbonate
Activity coefficients
Dilution
solubility
dilution
calcite
Solubility
thermodynamics
Thermodynamics
strontium carbonate
parameter

ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

The solubility of calcite, strontianite and witherite in NaCl solutions at 25°C. / Millero, Frank J; Milne, Peter J.; Thurmond, Valerie L.

In: Geochimica et Cosmochimica Acta, Vol. 48, No. 5, 1984, p. 1141-1143.

Research output: Contribution to journalArticle

Millero, Frank J ; Milne, Peter J. ; Thurmond, Valerie L. / The solubility of calcite, strontianite and witherite in NaCl solutions at 25°C. In: Geochimica et Cosmochimica Acta. 1984 ; Vol. 48, No. 5. pp. 1141-1143.
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