Table 1.

Melt composition and calculated volatile–melt solubility parameters

Melt composition
SiO2TiO2Al2O3FeOMgOCaONa2OK2OP2O5H2OCO2Sum
Wt% oxides47.51.9911.718.581.50.350.1711100.93
Mole fractions0.4520.0140.0500.0930.2620.0820.0140.0020.0010.0170.0131.000
Model parameters
0.0170.5170.3550.0160.8050.524−0.482−2.30014739621559676

Calculations follow the model described by Iacono-Marziano et al. (2012) and were done on an anhydrous basis. FeO is assumed equal to total FeO. is the mole fraction of H2O in the melt. is the molar ratio (Al2O3/CaO + Na2O + K2O). and are the respective sums (FeO + MgO) and (Na2O + K2O) as mole fractions. is calculated by consolidating the compositional related to the effect of melt composition on CO2 solubility and regression parameters determined by Iacono-Marziano et al. (2012) so that . Similarly, . Pressure and temperature have units of bars and Kelvins respectively.