Mineral: |
Goethite |
Reference: |
LE94 |
SCM Type: |
CC - Constant Capacitance
(C1: 0.4 F/m2) |
Ionic Strength: |
0.001 mol/L of
NaCl
|
Site Type: |
»Fe-OH |
PZC: |
9.1 |
pK1: |
7.092 |
pK1°I=0 (Conversion to I = 0): |
7.08 |
pK12.31 nm−2 (normalized): |
7.17 |
pK2: |
11.11 |
pK2°I=0 (Conversion to I = 0): |
11.09 |
pK22.31 nm−2 (normalized): |
11.04 |
Site Density in nm-2: |
2.7400 |
Original Site Density: |
2.74 sites / nm² surface
|
Solid/Liquid Ratio in g/L: |
3.612 |
pH Range: |
5-10 |
Temperature in K: |
298.15 |
Method for Site Density: |
Potentiometric Titration |
Method for Protolysis: | Potentiometric Titration |
Fit Method: | FITEQL |
Comment: |
reported values are for I=0.001 M, other ionic strengths were 0.01 and 0.1 M; optimum PZNPC in the range 9.05 to 9.10; temperature 25+-0.2°C; cited in [S03], good fit with Vy=10.9 |
|