| Mineral: |
Goethite |
| Reference: |
HL86a |
| SCM Type: |
TL - Triple Layer
(C1: 1.1 F/m2, C2: 0.2 F/m2) |
| Ionic Strength: |
0.01 mol/L of
NaNO3
|
| Site Type: |
»Fe-OH |
| PZC: |
8.4 |
| pK1: |
5.8 |
pK1°I=0 (Conversion to I = 0): |
5.76 |
pK12.31 nm−2 (normalized): |
6.28 |
| pK2: |
11.1 |
pK2°I=0 (Conversion to I = 0): |
11.06 |
pK22.31 nm−2 (normalized): |
10.62 |
| Site Density in nm-2: |
7.0000 |
| Original Site Density: |
7.0 sites / nm² surface
|
| Solid/Liquid Ratio in g/L: |
30.0 |
| pH Range: |
5.5-9.5 |
| Temperature in K: |
298.15 |
| Method for Site Density: |
Mean of Different Sources |
| Method for Protolysis: | Potentiometric Titration |
| Fit Method: | graphic extrapolation |
| Comment: |
SSD = 3.0 sites/nm2 from crystallographic analysis of FeOOH [S84]; SSD = 11.0 sites/nm2 from tritium exchange; SSD=7 sites/nm^2 used for model calculations, gave a good model fit to experimental data; citation in [CS95], [HL87], [HPL88] |
| |
