Process for the production of titanium dioxide, and titanium dioxide obtained thereby

A process for a production of a particulate TiO2, the process comprising:

• supplementing metatitanic acid with,
• an alkali metal compound in a quantity of 1200 ppm to 2400 ppm of an alkali metal,
• a phosphorus compound in a quantity of 0.1 wt.-% to 0.3 wt.-% by weight of P, expressed as phosphorus, and
• an aluminum compound in a quantity of 1 ppm to 1000 ppm of Al, expressed as Al,
• to thereby obtain a mixture,
• wherein, each of the quantity of the alkali metal compound, the quantity of the phosphorus compound and the quantity of the aluminum compound are with respect to the TiO2 content;
• calcining the mixture at a constant temperature of 940° C. to 1020° C. until a numerical fraction X50 of TiO2 has a primary crystallite size of at least 200 nm, to thereby obtain a calcined mixture;
• cooling the calcined mixture so as to obtain a cooled calcined mixture;
• and
• grinding the cooled calcined mixture to obtain the particulate TiO2.