PHASES
To define a name, chemical reaction, mass action constant and temperature dependence of the minerals and gas phases. In general, PHASES is used in the file with the thermodynamic database, but additional information can be stored in the input file phreeqc.in. A specific block is available in the HYDRUS-1D GUI to provide additional thermodynamic data (Solute Transport – HP2 Definition: Additions to Thermodynamic Database).
PHASES
phase name
association reaction
-add_constant
-add_logk
phase name |
Name of the phase, no spaces allowed. Gases are normally indicated by (g). |
association reaction |
The chemical dissolution reaction equation for phase. The chemical formula of the defined phase must be the first species of the reaction. The stoichiometric coefficient for the phase must be 1. |