The x-ray diffraction of specially grown single crystal of the TiO ₂II at room temperature and lower temperature was analyzed. The TiO₂II crystals were obtained by cooling an aqueous solution in a hermetic platinum ampoule with the use of a KONAK high-pressure chamber. The x-ray diffraction data were obtained at temperatures of 293, 223, and 133 K from needle single crystals with the use of a BRUKER diffractometer. The hemisphere of x-ray diffraction data was collected to verify the space group Pbcn. The analysis of equivalent maxima for the case of αPbO₂ with the use of the SMART program made it possible to prefer the C lattice as the most probable lattice instead of the expected P lattice. Result shows that there is a sharp decrease in the amplitude of the atomic thermal vibrations of the TiO₂II structure during the cooling range from 293 to 133 K.