TITLE Example 5.--Add oxygen, equilibrate with pyrite, calcite, and goethite.
SOLUTION 1  PURE WATER
        pH      7.0
        temp    25.0
EQUILIBRIUM_PHASES 1
        Pyrite          0.0
        Goethite        0.0
        Calcite         0.0
        CO2(g)         -3.5
        Gypsum          0.0     0.0
REACTION 1
        O2      1.0
        NaCl    0.5
        0.0     0.001   0.005   0.01    0.05
SELECTED_OUTPUT
        -file   ex5.sel
        -total  Cl
        -si     Gypsum
        -equilibrium_phases  pyrite goethite calcite CO2(g) gypsum
END