DATABASE c:\phreeqc\database\wateq4f.dat # used for phlogopite (biotite) SOLUTION_SPREAD Number pH Na Ca Mg K Alkalinity Si Cl S(6) 1 5.6 0.024 0.01 0.007 0.008 0.018 0.003 .014 .01 2 6.2 0.134 0.078 0.029 0.028 0.328 0.273 .014 .01 INVERSE_MODELING -solutions 1 2 # find solution 2 from 1 -uncertainty 0.05 # default is 0.05 or 5% -phases CO2(g) Kaolinite force prec Plagioclase force dis Phlogopite # iron-free biotite Adularia -balances Cl; S(6) -0.7e-5 PHASES Plagioclase Na0.62Ca0.38Al1.38Si2.62O8 + 5.52H+ + 2.48H2O = .62Na+ + .38Ca+2 + 1.38Al+3 + 2.62H4SiO4 log_k 0.0 END