| 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: |
-5.8 |
|
pK22.31 nm−2 (normalized): |
-6.28 |
| 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: |
348.15 |
| 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: |
-4.8 |
|
pK22.31 nm−2 (normalized): |
-5.28 |
| 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: |
348.15 |
| 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 |
| |
