I'm currently making may first steps using GWB. I'm trying to calculate mineral saturation indexes for some sulfide minerals (pyrite, sphalerite, chalcopyrite, galene) that do not appear in the default list as proposed by GSS. Equilibrium constants for the dissolution reactions of these mineral are in the thermo.tdat file (more or less the LLNL database), then I can not figure why GSS do not propose it by default. Of course, my dataset includes Zn and SO4 concentrations.
Thanks for helping.