Correlation Between Structure and Hydriding Behaviours in Laves Phases: Zr(M _x Cr_1−x )₂, M = Fe, Ni*

Modification of the hydrogenation properties of LaNi5 upon Ni substitution by Rh, Ir, Pt or Au

“…Increase of the cell volume yields larger interstitial sites and correlated greater hydride solubility as has been shown also for Laves phase compounds [19].…”

Elaboration and Characterization of New Pseudo-Binary Hydride-Forming Phases Pr1.5Mg0.5Ni7 and Pr3.75Mg1.25Ni19: A Comparison to the Binary Pr2Ni7 and Pr5Ni19 Ones

“…This effect is much larger than that of the cell volume reduction (−2.6%) and therefore is predominant leading to a pressure stabilization for the pseudobinary compound and to an increase of the overall capacities. Such hypothesis has already been described earlier for Zr-based Laves phase and can be easily transposed here for these stacking compounds. Finally, it is noted that very few differences are observed between the R and the H phases as they behave very closely regarding cell contraction.…”

The Role of the Site Sizes in Hydridation of Laves Phases (C14)

“…We have mentioned above that the mean site sizes, particularly of A 2 B 2 type, are the determining factor of the hydriding characteristics of this alloy family. It has been shown 13 that it is possible to establish a linear law connecting the kinetic and thermodynamic parameters to the average size of A 2 B 2 sites for the studied compounds.…”

“…In a previous investigation, 13 we have shown that the A 2 B 2 site size is the basic criterion which allows one to manipulate the characteristic properties (kinetic and thermodynamic) of intermetallic compound hydrides Zr(M x Cr 1-x ) 2 with M = Fe, Ni. In order to generalise the validity of our criterion, we have extended our study to other Laves phases (C14) reported in the literature.…”