From magnesium based intermetallics to metal hydrides: structures, properties and reaction pathways
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Holger Kohlmann
Abstract
Magnesium based intermetallics may be hydrogenated to the corresponding hydrides, which show a huge variety of compositions, crystal structures, chemical bonding and physical properties. With the late transition metals (groups 7–10) hydridometallate complexes are formed, such as the hydrogen storage material Mg2NiH4. Salt-like hydrides are found for ternary compounds of magnesium with the alkaline, alkaline earth and rare earth metals. Some of these can be synthesized by hydrogenating the analogous intermetallic compounds, involving a metal to semiconductor transition. In contrast to such electron precise compounds, palladium rich intermetallics of magnesium form interstitial hydrides with considerable homogeneity ranges with respect to hydrogen. In MgPd3 and related compounds hydrogen induces a rearrangement of the intermetallic structure from one (ZrAl3 type) to another (AuCu3 type) superstructure of a cubic closest packing of metal atoms.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Articles in the same Issue
- Preface
- At the edge of covalency: metallic nanotubes, low-dimensional metals and clusters
- Fast charge transport of titania nanotube arrays in dye-sensitized solar cells
- New quaternary complex borides, Ti9M2Ru18B8 (Cr, Mn, Co, Ni, Cu, Zn): synthesis, crystal structure and bonding analysis
- Polymorphism of isotypic series of homoleptic 1,2,3-triazolate MOFs [Ln(Tz*)3] containing the heavy lanthanides Gd–Lu: from open to dense frameworks of varying dimensionality
- From magnesium based intermetallics to metal hydrides: structures, properties and reaction pathways
- Crystal and magnetic structures of the complex perovskites LaCu3(Mn4–xFex)O12 with colossal magnetoresistance
- An investigation of the polytypical structure of Sr0.2Ba0.8CoO3–δ by neutron powder diffraction
