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| Wavenumber (cm−1) | Peak assignment |
|---|---|
| 3570 | Hydroxyl stretching (–OH) |
| 1650 | O–H–O bending mode |
| 1410 | CO32− asymmetric stretching |
| 1450 | CO32− asymmetric stretching |
| 1020 | PO43− asymmetric stretching |
| 960 | PO43− symmetric stretching |
| 870 | CO32− out-of-plane bending |
| 630 | PO43− bending |
| 560 | PO43− bending |
| 440 | PO43− out-of-plane bending |
