Mineral: |
Goethite |
Reference: |
S79 |
SCM Type: |
CC - Constant Capacitance |
Ligand: |
Si(OH)4<0>
- Silicic acid
|
Site Type: |
»Fe-OH |
Equation: |
»Fe-OH + Si(OH)4<0> ⇔ »Fe-H2SiO4<1-> + H<1+> + H2O |
LogK: |
-3.3 LogK°I=0 (Conversion to I = 0): -3.41
LogK2.31 nm−2 (SSD-normalized): 1.97
|
Experiment: |
Potentiometric Titration |
Ionic Strength: |
0.1 mol/L
NaClO4
|
Temperature: |
295.15 K |
Solid/Liquid Ratio: |
6.0 g/L |
pH Range: |
3-10 |
Ligand Concentration Range: |
2E-4. 4E-4. 8E-4 mol/L |
Fit Method: |
graphic extrapolation |
Comment: |
cited in [SKS80], [SS87] and [SS80], SCM named \"ligand exchange model\", dependece on charge e^(F psi/R T) |
|