| Mineral: |
Goethite |
| Reference: |
RHV06a |
| SCM Type: |
CDM - (CD-)MUSIC
(C1: 0.98 F/m2, C2: 0.73 F/m2) |
| Ionic Strength: |
0.01 mol/L of
NaNO3
|
| Site Type: |
»Fe-singly |
| PZC: |
9.0 |
| pK1: |
9.0 |
pK1°I=0 (Conversion to I = 0): |
8.96 |
pK12.31 nm−2 (normalized): |
9.17 |
| pK2: |
|
pK2°I=0 (Conversion to I = 0): |
|
|
| Site Density in nm-2: |
3.4500 |
| Original Site Density: |
3.45 sites / nm² surface
|
| Solid/Liquid Ratio in g/L: |
16.52 |
| pH Range: |
5-10.5 |
| Temperature in K: |
293.15 |
| Method for Site Density: |
Geometrical Calculation |
| Method for Protolysis: | Potentiometric Titration |
| Fit Method: | graphic extrapolation |
| Comment: |
pK=PZC; C1=0.98+-0.01, C2=0.73+-0.05 F/m^2; SSD: 90% 110/100 face (3sites/nm^2) and 10% 021/001 face (7-8sites/nm^2) for singly coordinated surface group, 2.7 for triply coordinated surface group; protolysis equation >> FeOH^-1/2 + H+ = >>FeOH2^1/2 and >>Fe3O^-1/2 + H+ = Fe3OH^1/2 |
| |
