Disordering of 13C 18O bonds in CO2 gas over a heated quartz surface at 50–1100 °C: Insights into the abundance of mass 47 (∆47) in CO2 gas at thermodynamic equilibrium

The clumped isotope composition or the ∆47 value of CO2 relates the abundance of 13C18O16O among all the CO2 isotopologues to the formation temperature of a carbonate mineral or the equilibration temperature of CO2 gas. The ∆47 data typically requires several standardization steps and one of which heavily relies on true or equilibrium Δ47 values from different temperatures. However, they have not yet been experimentally quantified and only …