The diffusive behavior of 134Cs was studied at 1000 to 1470C. The results could be described by:

<111> monocrystalline, 4N-purity:     D (cm2/s) = 8.7 x 10-11 exp[-28.0(kcal/mol)/RT]

polycrystalline, 2N8-purity:     D (cm2/s) = 1.5 x 10-10 exp[-16.0(kcal/mol)/RT]

A.A.Korolev, L.V.Pavlinov: Fizika Metallov i Metallovedenie, 1970, 29[6], 1326-8