Rietveld refinement of powder XRD data of undoped and Co-doped TiO₂ (T1: undoped TiO₂, T3: 3% Co-TiO₂, T4: 5% Co-TiO₂, T5: 7% Co-TiO₂).

Sample	Lattice parameters						Cell volume	Positions					Agreement factors
	a (Å)	b (Å)	c (Å)	α	β	γ		x	y	z	B_iso	Occ	R p	R wp	χ 2
T1	3.7925	3.7925	9.4860	90	90	90	136.44	0.00	0.75	0.125	4.18	1.00	2.90	3.80	1.55
Ti
O								0.00	0.25	0.0891	−9.47	1.00
T3	3.7924	3.7924	9.4925	90	90	90	136.53	0.00	0.75	0.125	6.00	0.97	2.08	2.67	1.07
Ti
O								0.00	0.25	0.0872	−3.47	1.0
Co								0.00	0.75	0.125	6.00	0.03
T4	3.7958	3.7958	9.4960	90	90	90	136.82	0.00	0.75	0.125	0.21	0.95	2.19	2.75	1.09
Ti
O								0.00	0.25	0.1070	0.76	1.00
Co								0.00	0.75	0.125	0.21	0.05
T5	3.7991	3.7991	9.4830	90	90	90	136.87	0.00	0.75	0.125	5.85	0.9	1.92	2.41	1.08
Ti
O								0.00	0.25	0.0879	−5.44	1.00
Co								0.00	0.75	0.125	5.85	0.1