ChemInform Abstract: 1H NMR Studies of the System Ti3SbHx

Abstract

ChemInform Abstract are carried out at different hydrogen contents in the range 0.3 ≤ x ≤ 1.74. From the results of a comparison of calculated second moments of the 1H NMR lines with experimental ones it is concluded that hydrogen occupies the tetrahedral interstitial sites surrounded by Ti atoms in the Ti3Sb lattice. From a study of the temp. dependence of the line width, it is possible to determine the diffusion parameters (correlation frequency (νc = 104 Hz), activation energy (Ea = 0.10 eV), and diffusion coefficient (D = 10-12 cm2/sec)) over a limited temp. range in which the transition from the rigid lattice to motional narrowing take place. Diffusion of hydrogen in Ti3Sb is found to be easier compared to other Ti-based alloys.