Table 1. hkl reflections for the ppv phase used in unit cell determination for En80 taken at 108 GPa and San Carlos olivine at 144 GPa at 300 K after T quench from 2,000 K.
| En80 d-spacing, Å
|
San Carlos olivine d-spacing, Å
|
|||
|---|---|---|---|---|
| hkl | Observed | Calculated | Observed | Calculated |
| 020 | 4.067 | 4.065 | 3.990 | 3.991 |
| 002 | 3.061 | 3.059 | 3.034 | 3.036 |
| 022 | 2.443 | 2.444 | 2.413 | 2.416 |
| 110 | — | — | 2.336 | 2.335 |
| 023 | 1.821 | 1.823 | 1.802 | 1.805 |
| 131 | 1.747 | 1.749 | 1.722 | 1.725 |
| 132 | 1.568 | 1.568 | 1.548 | 1.548 |
| 113 | 1.544 | 1.544 | 1.531 | 1.529 |
| 004 | 1.529 | 1.529 | 1.518 | 1.518 |
| 043 | 1.437 | 1.440 | 1.422 | 1.421 |
| 062* | 1.239 | 1.239 | 1.219 | 1.219 |
| 044 | 1.223 | 1.222 | 1.208 | 1.208 |
Observed d-spacings were used to fit lattice parameters; the d-spacings calculated from those lattice parameters are given for comparison.
*
The 062 peak contains contributions from the 152, 062, and 200 reflections.