Table 1 P–T–t conditions and estimated values of kinetic parameters for the back-transformation from ringwoodite to olivine
Run No. | Pressure (GPa) | Temperature (°C) | Duration (s) | ∆Gr (J/mol) | n | ln k | Growth rate1 (m/s) |
|---|---|---|---|---|---|---|---|
M2932 | 0.5 | 715 | 360 | − 45,101 | 0.67 | − 4.36 | 3.0 (0.1) × 10–9 |
M2716 | 1.1 | 615 | 1620 | − 41,382 | No transformation | ||
|  | 1.1 | 765 | 1225 | − 43,039 | 0.64 | − 1.96 | 5.7 (0.4) × 10–8 |
M2893 | 1.2 | 510 | 1055 | − 39,817 | No transformation | ||
|  | 1.2 | 645 | 18,340 | − 41,283 | 0.85 | − 9.10 | 3.8 (0.1) × 10–11 |
M2614 | 1.3 | 920 | 135 | − 43,924 | Completed within 10 s | ||
M2714 | 1.9 | 455 | 3920 | − 36,326 | No transformation | ||
|  | 1.7 | 715 | 2720 | − 39,917 | 0.89 | − 6.74 | 7.2 (0.1) × 10–10 |
M2620 | 4.1 | 510 | 445 | − 28,161 | No transformation | ||
|  | 4.1 | 820 | 230 | − 31,202 | 1.11 | − 3.50 | 5.8 (0.4) × 10–8 |
M2717 | 7.4 | 515 | 435 | − 16,122 | No transformation | ||
M2096 | 7.5 | 700 | 415 | − 17,412 | No transformation | ||
|  | 6.6 | 800 | 2590 | − 21,536 | 0.91 | − 5.63 | 2.9 (0.2) × 10–9 |