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Table 2

Assignments of Raman bands in the spectra of CaO-SiO2-Nb2O5-CeO2-CaF2 slag system.

Structural unit Raman centered shift (cm−1) References
Si-O-Si deformation vibration 635–645 [1012]
[NbO6] octahedra with low degree of distortion coupled with Si-O-Si bond 680–720 [1012]
[NbO6] octahedra with high degree of distortion 790–805 [1012]
in monomer structure unit (Q0) 840–860 [5,2830]
in dimer structure unit (Q1) 900–920 [5,2830]
in chain structure unit (Q2) 960–980 [5,2830]
in sheet structure unit (Q3) 1040–1060 [5,2830]

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