Table 2 Type of bonding represented by FTIR spectrum for zeolite RHO particles35,36,37.
From: Zeolite RHO Synthesis Accelerated by Ultrasonic Irradiation Treatment
Characteristic band (cm−1) | Type of bonding |
|---|---|
3650–3200 | O-H stretching of adsorbed water |
1700–1600 | O-H bending of lattice water |
1250–950 | Si-O and Al-O tetrahedra asymmetrical stretching vibration |
820–750 | External linkage symmetrical stretching |
720–600 | Internal SiO4 group symmetrical stretching vibration |
650–500 | Double ring vibration |
500–420 | TO4 symmetrical stretching due to TO4 bending |
