Comment on “Effect of electronegativity on the mechanical properties of metal hydrides with a fluorite structure” by Ito et al. [J. Alloys Compd. 426 (2006) 67]

Comment to a paper by Ito et al. concerning a relation between lattice parameter and electronegativity in metal hydrides. It is shown that this relation cannot be applied for (Ti,Zr)H2 on one hand and YH2 on the other, the claimed “correlation” being due to erroneous interpretation of experimental data for the latter.