| Mineral: |
Goethite |
| Reference: |
JP82 |
| SCM Type: |
TL - Triple Layer
(C1: 1.0 F/m2, C2: 0.2 F/m2) |
| Ionic Strength: |
0.1 mol/L of
KNO3
|
| Site Type: |
»Fe-OH |
| PZC: |
7.35 |
| pK1: |
4.2 |
pK1°I=0 (Conversion to I = 0): |
4.09 |
pK12.31 nm−2 (normalized): |
5.06 |
| pK2: |
10.5 |
pK2°I=0 (Conversion to I = 0): |
10.39 |
pK22.31 nm−2 (normalized): |
9.64 |
| Site Density in nm-2: |
16.8000 |
| Original Site Density: |
16.8 sites / nm² surface
|
| Solid/Liquid Ratio in g/L: |
|
| pH Range: |
5-10 |
| Temperature in K: |
298.15 |
| Method for Site Density: |
Literature |
| Method for Protolysis: | Potentiometric Titration |
| Fit Method: | graphic extrapolation |
| Comment: |
raw data from [Y75]; PZNPC is calculated in [LMB95] (PZC=1/2(pK1+pK2) for infinite dilution; cited in [HL85] as evalution of raw data from [Y75] by [D78] (cited as [D77]) (there pK1=4.2, pK2=10.8); SSD from [Y75] (geometrical calculation), other SSD 16.4+-0.7 (tritium exchange); 0.001-0.1M KNO3 |
| |
