Table 2 Raman spectral parameters: positions (xD and xG), full width at half maximum (ωD and ωG) and intensity ratio (ID/IG) of D and G bands
xD (cm−1) | ωD (cm −1) | xG (cm−1) | ωG (cm−1) | ID/IG | ||
|---|---|---|---|---|---|---|
References | ||||||
Graphite | GRZ | 1,351 ± 3 | 188 ± 18 | 1,598 ± 1 | 67 ± 2 | 0.78 ± 0.13 |
Lampblack | LBZ | 1,357 ± 2 | 215 ± 7 | 1,585 ± 2 | 104 ± 4 | 0.91 ± 0.06 |
Bistre | BSZ | 1,360 ± 3 | 334 ± 13 | 1,578 ± 4 | 116 ± 5 | 0.85 ± 0.09 |
Bitumen | BTZ | 1,394 ± 3 | 299 ± 11 | 1,603 ± 2 | 102 ± 3 | 0.79 ± 0.06 |
Ivory black | IBZ | 1,358 ± 2 | 274 ± 5 | 1,593 ± 2 | 102 ± 4 | 0.94 ± 0.09 |
Commercial charcoal | CWC | 1,345 ± 2 | 258 ± 4 | 1,594 ± 1 | 75 ± 3 | 0.74 ± 0.08 |
Van Dyck | VDK | 1,381 ± 4 | 237 ± 10 | 1,593 ± 3 | 106 ± 6 | 0.70 ± 0.13 |
Earth of Kassel | EKZ | 1,382 ± 3 | 228 ± 7 | 1,592 ± 2 | 98 ± 3 | 0.63 ± 0.10 |
Samples | ||||||
Saint Gregorius Magnus | SGM8 | 1,378 ± 6 | 455 ± 20 | 1,587 ± 2 | 117 ± 4 | 0.67 ± 0.09 |
The Trinity | TRI8 | 1,357 ± 3 | 271 ± 9 | 1,593 ± 2 | 84 ± 3 | 0.75 ± 0.10 |
Saint Lion the Pope | SLP6 | 1,365 ± 4 | 412 ± 28 | 1,602 ± 2 | 134 ± 10 | 0.95 ± 0.12 |
Saint Benedict the Black | SBN1 | 1,374 ± 3 | 226 ± 9 | 1,580 ± 3 | 118 ± 4 | 0.82 ± 0.15 |