Wave number (cm1) | Crystal phase |
---|---|
850 | υ2 CO32− out of plane bending |
1400–1500 | υ3 CO32− stretching vibrations |
600–500 | The vibration of C3AH6and may overlap with that of the Al–O6 |
550–520 850–800 | The Al–O vibrations |
1100–1000 | The absorption band of α-Al(OH)3 |
970–990 1027 | The O–H bending vibration attributed to gibbsite (AH3) |
3475, 3530 and 3630 | The O–H stretching vibration attributed to gibbsite (AH3) |
524, 3465 and 3670 | The bands appearing of the water hydrated CAC paste (CAH10, C2AH8 and C3AH6) |
1650–1600 | The H–O–H bending vibration band of CAH10 |
1100–1050 | The symmetric stretching vibration of υ3 PO43− |
650–560 | The PO43− bending vibration |
445–815–950 | CSH phase |
491–667 | Si–O–Si the main band corresponding to Si–O bond |
490 | υ2 OH− stretching in Ca(OH)2 or HAP |
3648 | Very broad OH− absorption bands |
2500–3700 | OH− band |