Structure D 2000Crystal Structures and Hydrogen-Induced Decomposition of La(Mg 1-x Al x ) 3 Alloys.-The title alloys (x = 0.1, 0.2, 0.3, 0.4) are characterized by XRD, SEM, and their hydrogenation reactions. The compound La6Mg22Al, existing in these alloys crystallizes with the Th6Mn23-type structure in the space group Fm3m. All the phases decompose into LaH3, MgH2, and La3Al11 under hydrogen at 473 K. -(ZHANG*, Q. A.; LIU, Y.
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