Mixtures of Pb sulfate and ground zircon were used as the sources of diffusant, and depth profiles were measured using Rutherford back-scattering spectrometry. At 1000 to 1500C, the Arrhenius relationship was:

D(m2/s) = 1.1 x 10-1 exp[-550(kJ/mol)/RT]

D.J.Cherniak, E.B.Watson: Chemical Geology, 2001, 172[1-2], 5-24