Equilibrium equations ============= Functions to calculate the equilibrium concentration and speciation of volatiles in melt ± vapor and the proportions of melt and vapor given *P*, *T*, and the bulk composition of the system. These are iterative calculations, which are solved using Jacobian matrix/Newton-Raphson approach (solvers and initial guesses are also in this file). .. automodule:: VolFe.equilibrium_equations :members: