Mineral: |
Zirconium oxophosphate |
Reference: |
ADMCD08 |
SCM Type: |
CC - Constant Capacitance
(C1: 3.1 F/m2) |
Ionic Strength: |
KNO3
|
Site Type: |
»POH |
PZC: |
4.8 |
pK1: |
3.6 |
|
pK12.31 nm−2 (normalized): |
4.08 |
pK2: |
6.7 |
|
pK22.31 nm−2 (normalized): |
6.22 |
Site Density in nm-2: |
7.0000 |
Original Site Density: |
7.0 sites / nm² surface
|
Solid/Liquid Ratio in g/L: |
100.0 |
pH Range: |
|
Temperature in K: |
298.15 |
Method for Site Density: |
Potentiometric Titration |
Method for Protolysis: | Potentiometric Titration |
Fit Method: | FITEQL |
Comment: |
calculated surface acidity constants for the protonation (+) and deprotonation (-) reactions of the zirconium and phosphate suface sites modelled between 25 °C and 90°C; POH: 25°C logK+ = 3.6, logK- = -6.7; 50 °C logK+ = 3.6, logK- = -6.1; 75 °C logK+ = 3.6, logK- = -5.8; 90 °C logK+ = 3.6, logK- = -5.6; ZrOH: 25 °C logK+ = 3.2, logK- = -5.6; 50 °C logK+ = 3.2, logK- = -5.0; 75 °C logK+ = 3.2, logK- = -4.8; 90°C logK+ = 3.2, logK- = -4.7 |
|
Mineral: |
Zirconium oxophosphate |
Reference: |
ADMCD08 |
SCM Type: |
CC - Constant Capacitance
(C1: 3.1 F/m2) |
Ionic Strength: |
KNO3
|
Site Type: |
»Zr-OH |
PZC: |
4.8 |
pK1: |
3.2 |
|
pK12.31 nm−2 (normalized): |
3.68 |
pK2: |
5.6 |
|
pK22.31 nm−2 (normalized): |
5.12 |
Site Density in nm-2: |
7.0000 |
Original Site Density: |
7.0 sites / nm² surface
|
Solid/Liquid Ratio in g/L: |
100.0 |
pH Range: |
|
Temperature in K: |
298.15 |
Method for Site Density: |
Potentiometric Titration |
Method for Protolysis: | Potentiometric Titration |
Fit Method: | FITEQL |
Comment: |
calculated surface acidity constants for the protonation (+) and deprotonation (-) reactions of the zirconium and phosphate suface sites modelled between 25 °C and 90°C; POH: 25°C logK+ = 3.6, logK- = -6.7; 50 °C logK+ = 3.6, logK- = -6.1; 75 °C logK+ = 3.6, logK- = -5.8; 90 °C logK+ = 3.6, logK- = -5.6; ZrOH: 25 °C logK+ = 3.2, logK- = -5.6; 50 °C logK+ = 3.2, logK- = -5.0; 75 °C logK+ = 3.2, logK- = -4.8; 90°C logK+ = 3.2, logK- = -4.7 |
|