| Abstract: | 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. |
| Genre: | Article |
| ProdID: | 70011501 |
| Citation Author: | O'Neil, J. R.; Clayton, R. N.; Mayeda, T. K. |
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| Citation End Page: | 5558 |
| Citation Issue: | 12 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Chemical Physics |
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| Citation Number Of Pages: | 12 |
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| Citation Publisher: | American Institute of Physics |
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| Citation Search Results Text: | Oxygen isotope fractionation in divalent metal carbonates; 1969; Article; Journal; Journal of Chemical Physics; O‘Neil, J. R.; Clayton, R. N.; Mayeda, T. K. |
| Citation Start Page: | 5547 |
| Citation Volume: | 51 |
| Citation Year: | 1969 |
| Type: | citation/reference |
| Text: | Oxygen isotope fractionation in divalent metal carbonates; 1969; Article; Journal; Journal of Chemical Physics; O‘Neil, J. R.; Clayton, R. N.; Mayeda, T. K. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1063/1.1671982 |
| Date Other: | Wed, 1 Jan 1969 00:00 -0600 |
| Publisher: | American Institute of Physics |
