Chemical diffusion under anhydrous conditions was measured in synthetic and natural rutile. Rutherford back-scattering spectrometry was used to measure diffusion profiles. For diffusion parallel to c, at 800 to 1000C:

D(m2/s) = 9.1 x 10-15exp[-169(kJ/mol)/RT]

For diffusion normal to c, at 750 to 1050C:

D(m2/s) = 2.5 x 10-12exp[-227(kJ/mol)/RT]

D.J.Cherniak, J.Manchester, E.B.Watson: Earth and Planetary Science Letters, 2007, 261[1-2], 267-79