Table 5 Assignments of the absorption bands and peak positions (in cm− 1) corresponding to Si-O, S-O, and Al-O vibrations in the MIR spectra of SCC-0 and SCC-60 before firing (δ – bending vibrations, ν – stretching).
Recorded vibrations/cm− 1 | Assignment |
---|---|
∼ 1180 (m) | ῦ3 (S-O) in \(\:{\text{S}\text{O}}_{4}^{2-}\) from barite70 |
∼ 1083 (s) | ῦ3 (S-O) in \(\:{\text{S}\text{O}}_{4}^{2-}\) from barite and ῦ3 (Si-O) from a quarzt71,72 |
∼ 988, 983 (s) | ῦ3 (Si-O) of Q2 \(\:\text{i}\text{n}\) C-(A-)S-H, ῦ1 (S-O) in \(\:{\text{S}\text{O}}_{4}^{2-}\) from barite |
∼ 797, 780 (w) | ῦ1 (Si-O) from quartz, ν(Al-OH) in Al(OH)6 from AFm73 |
∼ 635, 609 (w) | ῦ2 (O-S-O) in \(\:{\text{S}\text{O}}_{4}^{2-}\) from barite |
∼ 570, 518 (m) | ῦ4 (O-Si-O), |
∼ 460 (s) | ῦ4 (O-Si-O) from quartz, ῦ4 (S-O) from barite |
∼ 420 (w) | ῦ4 (O-S-O)74 |