Table 5. Room Temperature Wavenumbers and Pressure Coefficients of Raman Lines Presented Previously in Figure 9 for Both BCW and CCWOa.
|
Ba2CeWO6 |
Ca3Ce2W2O12 |
||||
|---|---|---|---|---|---|
| ω (cm–1) | dω/dP to 22 GPa(cm–1/GPa) | R2 | ω (cm–1) | dω/dP to 9 GPa(cm–1/GPa) | R2 |
| 79 | 2.570 ± 0.038 | 0.99 | 71 | 1.089 ± 0.078 | 0.98 |
| 96 | 2.662 ± 0.067 | 0.99 | 82 | 1.853 ± 0.124 | 0.98 |
| 156 | 3.614 ± 0.372 | 0.95 | |||
| 188 | 3.268 ± 0.171 | 0.99 | 175 | 3.781 ± 0.584 | 0.91 |
| 236 | 1.649 ± 0.051 | 0.98 | 229 | 4.810 ± 0.146 | 0.99 |
| 268 | 1.875 ± 0.097 | 0.96 | 288 | –2.286 ± 0.312 | 0.91 |
| 291 | 1.452 ± 0.027 | 0.99 | 298 | 3.348 ± 0.381 | 0.94 |
| 370 | 4.019 ± 0.188 | 0.99 | |||
| 401 | 1.405 ± 0.046 | 0.98 | 414 | 1.755 ± 0.064 | 0.99 |
| 420 | 3.155 ± 0.105 | 0.98 | 445 | 1.681 ± 0.053 | 0.99 |
| 486 | 1.029 ± 0.060 | 0.9̀8 | |||
| 548 | 3.903 ± 0.128 | 0.99 | 509 | 2.075 ± 0.407 | 0.89 |
| 675 | 4.825 ± 0.218 | 0.97 | 650 | 7.266 ± 1.369 | 0.90 |
| 713 | 3.915 ± 0.329 | 0.97 | |||
| Split | 4.327 ± 0.363 | 0.97 | |||
| 746 | 5.523 ± 0.137 | 0.99 | 753 | 5.133 ± 0.223 | 0.99 |
| 813 | 3.704 ± 0.230 | 0.98 | |||
| 846 | 4.453 ± 0.155 | 0.98 | 828 | 4.703 ± 0.126 | 0.99 |
| 888 | 3.089 ± 0.707 | 0.95 | |||
a
In CCWO linear pressure coefficients were determined only for the pressure range up to 9 GPa, after which significant changes in the line positions were noted indicating a possible phase transition.