The Ti0.1V0.9HxDy alloys (x + y ≈ 0.7) were studied by using  2H nuclear magnetic resonance techniques. The 2H spectra revealed the sites of D. In the H-rich samples, D atoms occupied both octahedral and tetrahedral sites. In the deuteride, D-rich samples and samples with [H]/[D] = 1, the D atoms occupied tetrahedral sites. The activation energies for D diffusion were deduced from the temperature and frequency dependences of 2H spin-lattice relaxation times. The activation energy was higher for octahedral sites than

for tetrahedral sites, as in the case of H diffusion. The activation energy at octahedral sites was higher for D diffusion than for H diffusion. This isotope effect was negligible for the tetrahedral sites.

2H NMR Study of Sites and Dynamics of Deuterium and their Isotope Effects in Ti0.1V0.9HxDy (x + y ≈ 0.7). B.Bandyopadhyay, S.Hayashi: Journal of Alloys and Compounds, 2002, 330-332, 443-7