Table 1. Elemental Composition of the Two TiO₂ Materials Prior to Calcination^a.

element as oxide	anatase wt %	rutile wt %
TiO2	94.3	95.8
P2O5	0.82	0.49
Nb2O5	0.13	0.13
Ta2O5	0.009	0.009
Cl	4.4	3.1
FeO	0.015	0.044
SiO2	0.19	0.28
Al2O3	0.07	0.03
CaO	0.01	0.02
K2O	0.006	0.01

^aReprinted with permission from Haverkamp, R. G.; Wallwork, K.; Waterland, M.; Gu, Q.; Kimpton, J. A. Ind. Eng. Chem. Res. 2022,61 (19), 6333–634. Copyright 2022 American Chemical Society.³