Diffusion couple experiments (25 to 35kbar, 1260 to 1400C) were performed, in a piston-cylinder apparatus, on natural pyrope- and almandine-rich garnets. The results were combined with a re-analysis of previous profiles to obtain the Arrhenius expression:

D(m2/s) = 1.64 x 10-10exp[-226.9(kJ/mol)/RT]

S.A.Borinski, U.Hoppe, S.Chakraborty, J.Ganguly, S.K.Bhowmik: Contributions to Mineralogy and Petrology, 2012, 164[4], 571-86