The diffusive behavior of Zr was studied at 1550 to 1700C. The results could be described by:

D (cm2/s) = 5.58 x 100 exp[-36.1(kcal/mol)/RT]

D.Y.Povolotskii, V.E.Roshchin, A.N.Keis: Izvestiya Akademii Nauk SSSR, 1970, 5, 222-3