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The solubilities of calcite, aragonite and vaterite in CO2-H2O solutions between 0 and 90°C, and an evaluation of the aqueous model for the system CaCO3-CO2-H2O

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The solubilities of calcite, aragonite and vaterite in CO2-H2O solutions between 0 and 90??C, and an evaluation of the aqueous model for the system CaCO3-CO2-H2O; 1982; Article; Journal; Geochimica et Cosmochimica Acta; Plummer, L. N.; Busenberg, E.

Summary

Calculations based on approximately 350 new measurements (CaT-PCO2) of the solubilities of calcite, aragonite and vaterite in CO2-H2O solutions between 0 and 90°C indicate the following values for the log of the equilibrium constants KC, KA, and KV respectively, for the reaction CaCO3(s) = Ca2+ + CO2−3: where T is in oK. At 25°C the logarithms of the equilibrium constants are −8.480 ± 0.020, −8.336 ± 0.020 and −7.913 ± 0.020 for calcite, aragonite and vaterite, respectively. The equilibrium constants are internally consistent with an aqueous model that includes the CaHCO+3 and CaCO03 ion pairs, revised analytical expressions for CO2-H2O equilibria, and extended Debye-Hückel individual ion activity coefficients. Using this aqueous [...]

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Type Scheme Key
local-index unknown 70011789
local-pk unknown 70011789
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1016/0016-7037(82)90056-4
series unknown Geochimica et Cosmochimica Acta

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journalGeochimica et Cosmochimica Acta
parts
typevolume
value46
typeissue
value6
languageEnglish
citationTypeArticle

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