| Sample | Peak position (2θ) | Intensity (counts/s) | Crystallinity (%) |
| EFB | 15.8 (amorphous) | 1153.1 | 51.7 |
| 22.2 (crystalline) | 2392.1 | ||
| 0.5 wt% Cu-EFB | 16.4 (amorphous) | 806.2 | 59.1 |
| 22.4 (crystalline) | 1971.40 | ||
| 1 wt% Cu-EFB | 16.6 (amorphous) | 723.2 | 60.1 |
| 22.5 (crystalline) | 1812.50 |