Table 1. Summary of the previous assignments of the pre-edge transitions in the XAS of r-TiO₂ at the Ti K-edge.

Off-site transitions are shown in bold. E1 stands for dipole transitions and E2 for quadrupolar transitions.

A1	A3	B	Reference
	3d(t 2g)	3d(e g)	(Fischer, 1972 ▸)
E2: 3d xz			(Brouder et al., 1990 ▸)
E2: 3d xz	E1,E2: 3d xy,yz	E1,E2: 3d xy,yz	(Poumellec et al., 1991 ▸)
	3d(t 2g)	3d(e g)	(Uozumi et al., 1992 ▸)
3d–4p	3d–4p	4p–4s	(Wu et al., 1997 ▸)
Core exciton	3d(t 2g)	3d(e g)	(Beaurepaire et al., 1993 ▸)
E2: 3d(t 2g)	E1,E2: 3d(e g)	E1: 3d–4p	(Cabaret et al., 1999 ▸)
	3d(t 2g)	3d(e g)	(Shirley, 2004 ▸)
E2: 3d(t 2g)			(Le Fèvre et al., 2005 ▸)
E2: 3d(t 2g)	E1: pz–3d(t2g), E2: 3d(e g)	E1: pz–3d(eg)	(Cabaret et al., 2010 ▸) ()
E2: 3d(t 2g)	E1: px, y–3d(t2g)	E1: px, y–3d(eg)	(Cabaret et al., 2010 ▸) ()
E2: ,E1: 4p x,y	E1: 4pz,3dxz,yz	E1: 4pz	(This work)