Gas phase permeation techniques were used to determine the permeability and diffusivity of D. The measurements were performed at temperatures ranging from 340 to 850C, and pressures ranging from 1300 to 105N/m2. The diffusivity results could be described by:

D (m2/s) = 0.00014 exp[-74.4(kJ/mol)/RT]

The solubility was deduced from the permeability and diffusivity data, and was equal to 7.2 x 1019/m2N; a value which was essentially independent of the temperature.

Diffusivity and Solubility of Deuterium in a Mo-Re Alloy. M.R.Shanabarger: Scripta Metallurgica et Materialia, 1994, 30[6], 749-53