Oxygen isotope fractionation in divalent metal carbonates

Journal of Chemical Physics
By: , and 



Equilibrium fractionation factors for the distribution of 18O between alkaline-earth carbonates and water have been measured over the temperature range 0-500??C. The fractionation factors ?? can be represented by the equations CaCO3-H2O, 1000 ln??=2.78(106 T-2)-3.39, SrCO3-H 2O, 1000 ln??=2.69(106 T-2)-3.74, BaCO3-H2O, 1000 ln??=2.57(106 T -2)-4.73. Measurements on MnCO3, CdCO3, and PbCO3 were made at isolated temperatures. A statistical-mechanical calculation of the isotopic partition function ratios gives reasonably good agreement with experiment. Both cationic size and mass are important in isotopic fractionation, the former predominantly in its effect on the internal vibrations of the anion, the latter in its effect on the lattice vibrations.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Oxygen isotope fractionation in divalent metal carbonates
Series title Journal of Chemical Physics
DOI 10.1063/1.1671982
Volume 51
Issue 12
Year Published 1969
Language English
Publisher American Institute of Physics
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of Chemical Physics
First page 5547
Last page 5558