Table 3. Summary of Weight Fractions Extracted from PXRD Patterns by Rietveld Refinement for All Initial Samples, as well as for the Recovered Ones after the In Situ PXRD Experiments and after the DRM Treatment.
| sample/weight fraction (%) | LaNi2O4 | La2O3 | La(OH)3 | La2O2CO3 hex. | La2O2CO3 mono. | Ni metal | BaCO3 | |
|---|---|---|---|---|---|---|---|---|
| La2Ni0.9Cu0.1O4 | initial | 98.9(0.9) | 0.2(0.1) | 0.9(0.3) | - | - | - | - |
| recovered from in situ experiment | 99.2(0.8) | 0.2(0.2) | - | - | 0.6(0.2) | - | - | |
| recovered from DRM experiment | - | 63.2(1.6) | 10.8(0.8) | - | 10.7(1.0) | 15.3(1.2) | - | |
| La2Ni0.8Cu0.2O4 | initial | 98.6(0.8) | 0.5(0.2) | 0.9(0.2) | - | - | - | - |
| recovered from in situ experiment | - | 73.3(0.8) | - | 1.3(0.3) | 5.8(0.7) | 19.6(0.7) | - | |
| recovered from DRM experiment | - | 56.7(0.9) | 24.4(0.7) | - | 1.8(0.3) | 17.1(0.3) | - | |
| La1.8Ba0.2NiO4 | initial | 97.3(1.3) | 1.8(0.2) | 0.9(0.2) | - | - | - | - |
| recovered from in situ experiment | 97.7(1.4) | 0.9(0.2) | - | 0.7(0.2) | 0.5(0.2) | 0.2(0.1) | - | |
| recovered from DRM experiment | - | 65.6(0.9) | - | - | 11.9(0.6) | 16.4(0.6) | 6.1(0.4) | |
| La1.8Ba0.2Ni0.9Cu0.1O4 | initial | 98.6(0.6) | 0.8(0.1) | 0.6(0.1) | - | - | - | - |
| recovered from in situ experiment | - | 28.6(0.5) | - | 13.6(0.4) | 40.0(0.7) | 17.8(0.5) | - | |
| recovered from DRM experiment | - | 65.4(0.9) | - | - | 12.0(0.6) | 17.4(0.6) | 5.2(0.4) | |