Chronopotentiometric measurements were used to study the diffusion of Mo3+ ions in various melts. The data, for temperatures ranging from 900 to 1100K, could be described by:

D (cm2/s) = 7.60 x 10-3 exp[-11.822(kcal/mol)/RT]

It was suggested that Mo3+ diffusion occurred because of their jumping from complex MoCl63- anions and into vacant sites of the surrounding cationic envelope; and back again. Entropy of Diffusion Activation of Trivalent Mo in Salt Melts. O.A.Ryzhik: Tr. Tambov. Inst. Khim. Mashinostr., 1968, 2, 79-83