Self-diffusion of Si was measured in an albite melt, Na0.97Al0.99Si3.02O8, under 1atm at between 1160 and 1558C. The diffusion could be described by:

D(m2/s) = 1.37 x 10-4 exp[-337.4(kJ/mol)/RT]

D.R.Baker: Geochimica et Cosmochimica Acta, 1995, 59[17], 3561-71