FeAsCS.ppi

SPECIATION
  calculationType                      ht1
  calculationMethod                    1
  mainSpecies                          Fe As C S           # produce predominance diagrams for these four elements
  xmin                                 2.0
  xmax                                 10.0
  ymin                                 -85.0
  ymax                                 0.0
  resolution                           200

PLOT
  plotTitle                            "Fe-As-C-S<br>(minerals but no sorbed As)"
  xtitle                               pH
  ytitle                               pe
  pymin                                -10.0
  yscale                               pe                  # this changes to the pe scale
  extraText                            "extratextFeAsCS.dat"

  multipagefile                        t                   # put all the plots into a single file - only applies to ps and pdf

CHEMISTRY

INCLUDE 'ht1.inc' 

SOLUTION 1
   temp  25
   pH   1.8
   units mol/kgw
   S(6) 5e-3
   Fe   5e-3
   As   1e-2
   Na   1e-1
   Cl   1e-1 charge
END

USE solution 1
EQUILIBRIUM_PHASES 1
   Fix_H+ -<x_axis>  NaOH  10
     -force_equality true
   O2(g) <y_axis>  0.1
   CO2(g) -3.5     10

   Realgar              0 0
   Orpiment             0 0
   As2S3(am)            0 0
   Halite               0 0
   Arsenolite           0 0
   Claudetite           0 0
   Pyrite               0 0
   Mackinawite          0 0
   FeS(ppt)             0 0
   Sulfur               0 0
   Fe(OH)2.7Cl.3        0 0
#  Goethite             0 0
   Fe(OH)3(a)           0 0
#  Hematite             0 0
   Greigite             0 0
   Magnetite            0 0
   Nahcolite            0 0
   Siderite             0 0
   Maghemite            0 0
   Siderite(d)(3)       0 0
   Scorodite            0 0
   Natron               0 0
   Thermonatrite        0 0
   Fe3(OH)8             0 0
   Thenardite           0 0
   Melanterite          0 0
   Mirabilite           0 0
   As2O5(cr)            0 0
   Trona                0 0
   Jarosite-Na          0 0
   JarositeH            0 0
END