Table 1
Liquid-gas reactions.
| # | Reaction | s | Ref |
|---|---|---|---|
| 1 | SiO2(ℓ) ⇔ SiO(g) + 1/2O2 | 1/2 | Chase (1998) |
| 2 | SiO2(ℓ) ⇔ SiO2(g) | 0 | Chase (1998) |
| 3 | NaO1/2(ℓ) ⇔ Na(g) + 1/4O2 | 1/4 | Chase (1998) |
| 4 | KO1/2(ℓ) ⇔ K(g) + 1/4O2 | 1/4 | Chase (1998) |
| 5 | MgO(ℓ) ⇔ Mg(g) + 1/2O2 | 1/2 | Chase (1998) |
| 6 | FeO(ℓ) ⇔ Fe(g) + 1/2O2 | 1/2 | Chase (1998) |
Notes. On the left-hand side are the liquid oxides and on the right the gas oxides. We note that for species Na2O and K2O, we have considered the oxide normalized by the number of metal atoms, as in Sossi et al. (2020a, 2019). The mole fraction of NaO1/2 in melt is of 
. The same applies to K2O. Values of all thermodynamic constants were taken from Chase (1998).
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