| Mineral: |
Goethite |
| Reference: |
LSS90 |
| SCM Type: |
CC - Constant Capacitance
(C1: 1.28 F/m2) |
| Ionic Strength: |
0.1 mol/L of
NaNO3
|
| Site Type: |
»Fe-OH |
| PZC: |
8.4 |
| pK1: |
7.47 |
pK1°I=0 (Conversion to I = 0): |
7.36 |
pK12.31 nm−2 (normalized): |
7.33 |
| pK2: |
9.51 |
pK2°I=0 (Conversion to I = 0): |
9.40 |
pK22.31 nm−2 (normalized): |
9.65 |
| Site Density in nm-2: |
1.6800 |
| Original Site Density: |
1.68 sites / nm² surface
|
| Solid/Liquid Ratio in g/L: |
11.0 |
| pH Range: |
2.5-8.5 |
| Temperature in K: |
298.15 |
| Method for Site Density: |
Potentiometric Titration |
| Method for Protolysis: | Potentiometric Titration |
| Fit Method: | FITEQL |
| Comment: |
specific capacitance 1.28 F/m^2; in [NPLS96] with Extended CCM: 1/C(total)=1/C1 + 1/C2 = 1.28; systematic variation of C1 and C2: C1=2.6, C2=2.5; cited in [NLS92], NPLS96] and [PNRLOS98] (but there SSA 43 m^2/g as in [NPLS96] ); cited in [S03]; SSD evaluated by LETAGROPVRID; error interval corresponds to 3sigma |
| |
