Water-related bands in the IR absorption spectra of silicate glasses

New evaluation of the in vitro response of silicocarnotite monophasic material

“…The bands at 1560 and 1730 cm À 1 have been attributed to R-OH bonds (R=Si or P) in amorphous phases [32][33][34] although the ν 3 vibration mode of CO 3 3À group can be also contributing to the band around 1560 cm À 0.1 . Finally, the band around 1640 cm À 1 can be assigned to the overlapping of water and hydroxide related bands in Ca-P-OSi-H materials [32,33] and ν 3 vibration mode of CO 3 3À [29][30][31]. In the higher spectral region (Fig.…”

“…In the higher spectral region (Fig. 10), the bands at 2860, 2930 2965 and 3200 cm À 1 can be associated to the components of the asymmetric and symmetric stretching vibrations of the interstitial H 2 O molecules (each vibration having two components) in silicate and phosphate glasses [32][33][34].…”

The 10 μm band in amorphous MgSiO3: the influence of medium-range structure, defects and thermal processing

“…While the absence of any strong feature at 4.43 μm discounts Si-H defects from being present in significant quantities, a broad asymmetric feature is observed up to annealing temperatures of 400 • C, which is absent from the samples annealed at the higher temperatures. Efimov et al (2003) identified eight bands in the spectral envelope between 2.7 and 4.08 μm of silicate glasses: four at 2. 947, 3.125, 3.380, & 3.436 μm attributable to stretching vibrations in interstitial H 2 O and four at 2.782, 2.838, 3.636 and 3.934 μm attributable to OH stretch modes in Si-OH bonded hydroxyl.…”

The Elusory Role of Low Level Doping Transition Metals in Lead Silicate Glasses

“…Bands at 400-505 and 600 cm -1 Regarding the other absorption bands in the region 1,400-4,000 cm -1 , different authors have correlated the observed bands as follows; [28][29][30][31] 1. Band at 1,460 cm -1 , is related to carbonate groups.…”