What are the characteristics of the crystal structures, Anatase and Rutile?
Ans. Rutile is more widely used and has a more compact atomic structure which accounts for its higher refractive index, greater stability and higher density. The higher refractive index of rutile(2.7), compared with that of anatase(2.55) gives it a greater pacifying power and a better tint-reducing strength then anatase. When produced at the correct crystal size, titanium dioxide is a highly efficient scatterer of light, imparting whiteness, an opacity to the medium in which it is dispersed.
