Abstract
We study the formation of the AB2 Laves phases in RE–M–Al (where RE is Gd or Tb and M is Fe or Mn) systems and determine their hydrogen-sorption properties. The crystal structures of the original compounds and their saturated hydrides are studied by the X-ray powder diffraction method. It is shown that these compounds absorb hydrogen at pressures of 0.1–0.12 MPa without amorphization and their hydrogen-sorption ability decreases as the amount of aluminum in the compound increases.
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