Stability of calcite based on aqueous solubility measurements

Details Stability of calcite based on aqueous solubility measurements Stability of calcite based on aqueous solubility measurements

Aug 1968

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1968gecoa..32..835l&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 32, Issue 8, pp.835-851

Physics

1

Scientific paper

A review and revaluation of calcite solubility measurements in pure water indicates that the activity product of calcite at 25°C and 1 atm pressure is 10 -8.40±0.02 . G f 0 for Ca 2+ (aq) has been revaluated as -132,350 ± 250 cal gfw -1 . Based on the above data and G f 0 = -126,170 ± 70 cal gfw -1 for CO 3 2- (aq), G f 0 for calcite is -269,980 ± 260 cal gfw -1 . The study includes a detailed appraisal of the various errors relating to the solubility measurements and their interpretation.

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