Integrated neutron intensities for rutile (TiO2) were measured up to sin ∂/λ = 0.94 Å−1 with two crystals of volumes 1.2 mm3 and 8.9 · 10 −3 mm3. Statistical treatment showed the data not to be normally distributed. From statistics of symmetry-equivalent intensities there was no evidence of anisotropic extinction. Isotropic extinction parameters were refined for both crystals. There is no significant difference between the neutron and X-ray refined structure parameters. Thermal motion of titanium is larger than that of oxygen.