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Peak positions and baselines of vibrational bands used to calculate peaks intensity and width.
| Vibrational mode | Maximum peak position (cm−1) | Baseline (cm−1) |
|---|---|---|
| ν3(CO3) | 1415 | 2000–1800/1400–1200 |
| ν3(PO4) | 1035 | 1400-1200/900-750 |
| ν4(PO4) | 604 | 850-620/510-470 |
| ν4(PO4) | 565 | 850-620/510-470 |
For each peak the baseline is defined by two points selected at the local minimum in the spectral region within the intervals here indicated (Fig. 1).
