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OVERRIDE_MINERAL_MASS_ACTION¶
Allows the user to override species and stoichiometries specified in the database with a custom formulation. This enables the use of a subset of species when calculating the mineral saturation index and affinity factor. One can also override the log Ks specified in the database.
Required Cards:¶
- OVERRIDE_MINERAL_MASS_ACTION
Opens the block.
- <string>
Specifies mineral name.
Optional Cards:¶
- REACTION <string>
String of characters defining the new mass action equation.
- LOGK <float 1> … <float N>
Log Ks that correspond to the temperatures in the database. If only one log K is specified, it is applied for all temperatures.
Examples¶
CHEMISTRY ... OVERRIDE_MINERAL_MASS_ACTION Calcite REACTION Calcite + H+ <-> Ca++ + 1. HCO3- LOGK 2.2257 1.8487 1.3330 0.7743 0.0999 -0.5838 -1.3262 -2.2154 / / ... END CHEMISTRY ... OVERRIDE_MINERAL_MASS_ACTION Calcite REACTION Calcite + H+ <-> Ca++ + 1. HCO3- / / ... END CHEMISTRY ... OVERRIDE_MINERAL_MASS_ACTION Calcite LOGK 1.8487 / / ... END