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Mischmetal-nickel-iron hydrogen storage compound

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TLDR
In this paper, the Disclosure Discloses a hydridable compound of the general formula MNix-yFey, where M is mischmetal, x is a number between 4.5 and 5.5, and y is about 0.1 and 1.3.
Abstract
of the Disclosure Discloses a hydridable compound of the general formula MNix-yFey, where M is mischmetal, x is a number between 4.5 and 5.5 and y is a number between about 0.1 and 1.3.

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Hydrogen absorption in LaNi5 and related compounds: Experimental observations and their explanation

TL;DR: In this paper, a study of the change in hydrogen sorption properties caused by partially replacing La or Ni in LaNi5 by other metals is presented. But this study assumes that the more stable the original RNi5 compound, the weaker is the tendency to form a rNi5--hydride.
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