Oxygen isotope exchange between carbonic acid, bicarbonate, carbonate, and water: A re-examination of the data of (1950) and an expression for the overall partitioning of oxygen isotopes between the carbonate species and water

Details Oxygen isotope exchange between carbonic acid, bicarbonate, carbonate, and water: A re-examination of the data of (1950) and an expression for the overall partitioning of oxygen isotopes between the carbonate species and water Oxygen isotope exchange between carbonic acid, bicarbonate, carbonate, and water: A re-examination of the data of (1950) and an expression for the overall partitioning of oxygen isotopes between the carbonate species and water

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57.3815u&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 57, Issue 15, pp.3815-3818

Computer Science

8

Scientific paper

An examination of 's work (1950) shows that the 18 O / 16 O ratio of rapidly precipitated calcium carbonate depends upon the pH value of the solution and discloses that the oxygen isotope equilibrium fractionation between the sum of the dissolved carbonate species and water is linearly related to the equilibrium between the carbonate species. This relation permits the calculation of fractionation factors for the individual carbonate species and the expression of an overall fractionation factor in terms of individual factors and the oxygen proportions of the carbonate species. The fractionation factors a H 2 CO 3 - H 2 O = 1.0396, a HCO - 3 - H 2 O = 1.0346, and a CO 2- 3 - H 2 O = 1.0183 (25°C) compare well to recent data.

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