Directional metal-hydrogen bonding in interstitial hydrides: I. Structural study of ErNi3Dx(0 ≤ x ≤ 3.75)
(2005) Journal of Alloys and Compounds — Vol. 404-406, n° SPEC. ISS., p. 89-94 (2005)
Files
No attached file found for this publication.
Details
- Authors
- Abstract
- Hydrogenation of ErNi3 (space group R3̄m) has been investigated by neutron powder diffraction on deuterided samples. At least three ErNi3Dx phases were found at deuterium compositions x∼ 1.3 (β1), x∼ 2 (β2) and x∼ 3.8 (γ), the latter being stable only under high deuterium pressure. Their structures show anisotropic lattice expansions and are non-centrosymmetric (space group R3m). In the β1-phase, deuterium occupies two interstitial sites in the AB 2-type building block of which one provides three ligands of a Ni-centered NiD4 tetrahedron and the other bridges a Ni triangle. In the β2- and γ-phases, up to five new deuterium sites become partially occupied in both the AB2- and AB5-type building blocks. One of them provides the fourth ligand to the NiD4 tetrahedron thus suggesting directional bonding effects similar to those observed in nickel-based complex metal hydrides, such as LaMg2NiH7 and Mg 2NiH4. © 2005 Elsevier B.V. All rights reserved.
- Affiliations
University of Geneva (Switzerland) Crystallography
Citations
Filinchuk, Y., & Yvon, K. (2005). Directional metal-hydrogen bonding in interstitial hydrides: I. Structural study of ErNi3Dx(0 ≤ x ≤ 3.75). Journal of Alloys and Compounds, 404-406(SPEC. ISS.), 89-94. https://doi.org/10.1016/j.jallcom.2004.12.158 (Original work published 2005)