The crystal structure of LaNi5D7

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Abstract
The structure of beta LaNi5Dx was solved using neutron powder diffraction methods by making use of two specimens, one composed of normal Ni, the other of 60Ni. The diffraction patterns showed the existence of a superlattice line which could be indexed if the hexagonal unit cell of the metal was doubled along the C axis. The structure was refined by the method of Reitveld in space group P63 mc with good agreement between the observed and calculated intensities. The deuterium was found to occupy three different sites; two tetrahedrally coordinated with Ni4 and La2Ni2 neighbours and one octahedral site, La2Ni4.