Table 2 Results of the Raman spectra band analysis concerning single grains and aggregates of TiO2. Values highlighted in bold correspond to the highest intensity in the mixed-phase spectra contain rutile and quartz.
Single TiO2 grains | ||
|---|---|---|
Band shift (cm−1) | Band assignments | Phase |
206 | A1g Si-O symmetric bending vibrations | Quartz |
241 | Combination line | Rutile |
404 | Eg Si-O double stretching vibrations | Quartz |
441 | Eg Ti-O double bending vibrations | Rutile |
466 | A1g Si-O symmetric stretching vibrations | Quartz |
609 | A1g Ti-O symmetric stretching vibrations | Rutile |
695 | Eg Si-O double bending vibrations | Quartz |
TiO2 crystal aggregates | ||
Band shift (cm−1) | Band assignments | Phase |
197 | Eg Ti-O double bending vibrations | Anatase |
393 | B1g Ti-O antisymmetric bending vibrations | |
516 | A1g + B1g Ti-O symmetric and antisymmetric bending vibrations | |
638 | Eg Ti-O double stretching vibrations | |
