a18_HCO3_H2O: 18O/16O fractionation factor between HCO3(-) and H2O

Description Usage Arguments Details Value References See Also

View source: R/a18.R


a18_HCO3_H2O() calculates the 18O/16O fractionation factor between bicarbonate ion HCO3(-) and water.





Temperature (°C).


α^{18}_{HCO3(-)/H2O} = e^{2.59 \times \frac{1000}{T^{2}} + 0.00189}

The equation above and in the function is the uncorrected equation in Beck et al. (2005). They experimentally determined the fractionation factor using BaCO3 precipitation experiments. However, they applied the acid fractionation factor of calcite during the data processing and not that of BaCO3. The acid fractionation factor of BaCO3 is not known accurately, which may result in a bias of up to 1‰ in the calculated 1000lna values.


Returns the 18O/16O fractionation factor.


Beck, W. C., Grossman, E. L., & Morse, J. W. (2005). Experimental studies of oxygen isotope fractionation in the carbonic acid system at 15°, 25°, and 40°C. Geochimica et Cosmochimica Acta, 69(14), 3493-3503. doi: 10.1016/j.gca.2005.02.003

See Also

Other fractionation_factors: a13_CO2g_CO2aq(), a18_CO2acid_c(), a18_CO2aq_H2O(), a18_CO2g_H2O(), a18_CO3_H2O(), a18_H2O_OH(), a18_c_H2O(), a_A_B()

isogeochem documentation built on Nov. 7, 2021, 5:08 p.m.