The substitution of chromium for vanadium in ZrV 1 . 5 - x Cr x Ni 1 . 5 leads to a cubic C15 phase as the main phase with a low content of the secondary phase Zr 7 Ni 1 0 . The lattice parameters suggest a complex redistribution of V, Ni or Cr between the B and A sites of the Laves phase AB 2 , which does not depend only on the Cr content. The pressure-composition isotherms show sloping plateaux, alloy hydrogen contents between 3.35 and 4.25 H/mol and desorption enthalpies of ΔH=41.8-50.2 kJ/mol H 2 at constant H concentration (1.8 H/mol). Discharge capacities of between 113 and 222 mAh/g have been obtained for the hydride electrodes at a 160 mA/g discharge current; for the Cr-substituted alloys the discharge capacities increase with x.