Light metal borohydrides: crystal structures and beyond
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Yaroslav Filinchuk
Abstract
Experimental structures of M(BH4)n, where M is a 2nd–4th period element, are reviewed with a particluar emphasize on crystal chemistry. It is shown that except certain cases, the BH4 group has a nearly ideal tetrahedral geometry. Correction of the experimentally determined H-positions allows to compare directly the results obtained by different diffraction techniques and by theoretical calculations. Analysis of coordination geometries for M and BH4, and of mechanisms of phase transitions in LiBH4, suggest that the directional BH4 … M interaction is at the origin of structural complexity of borohydrides. The ways to influence their stability by chemical modification are discussed. Study of structural evolution with temperature and pressure is shown to be the way to access fundamental information on structural stability of these systems.
© by Oldenbourg Wissenschaftsverlag, Grenoble, Germany
Articles in the same Issue
- Editorial: Hydrogen Storage Materials
- Solving crystal structures of metal and chemical hydrides
- Pair Distribution Functions and Reverse Monte Carlo modelling of disordered metal hydrides
- Coexistence of hydrogen and polyanions in multinary main group element hydrides
- Structures of aluminium-based light weight hydrides
- Light metal borohydrides: crystal structures and beyond
- The structural properties of amides and imides as hydrogen storage materials
- Structural transitions induced by hydrogen absorption in metallic hydrides
- Crystal chemistry and metal-hydrogen bonding in anisotropic and interstitial hydrides of intermetallics of rare earth (R) and transition metals (T), RT3 and R2T7
- Hydrogen induced site depopulation in the LaMgNi4-hydrogen system
- The nature of deuterium arrangements in YD3 and other rare-earth trideuterides
- The crystal structure of α-MgD2 under high pressure by neutron powder diffraction
Articles in the same Issue
- Editorial: Hydrogen Storage Materials
- Solving crystal structures of metal and chemical hydrides
- Pair Distribution Functions and Reverse Monte Carlo modelling of disordered metal hydrides
- Coexistence of hydrogen and polyanions in multinary main group element hydrides
- Structures of aluminium-based light weight hydrides
- Light metal borohydrides: crystal structures and beyond
- The structural properties of amides and imides as hydrogen storage materials
- Structural transitions induced by hydrogen absorption in metallic hydrides
- Crystal chemistry and metal-hydrogen bonding in anisotropic and interstitial hydrides of intermetallics of rare earth (R) and transition metals (T), RT3 and R2T7
- Hydrogen induced site depopulation in the LaMgNi4-hydrogen system
- The nature of deuterium arrangements in YD3 and other rare-earth trideuterides
- The crystal structure of α-MgD2 under high pressure by neutron powder diffraction
