Phys. Rev. B 70, 180101(R) (2004) [3 pages]Reversible phase transition in LiAlH4 under high-pressure conditions
The structural stability of the hydrogen storage compound LiAlH4 was studied by Raman spectroscopy in the pressure interval 0–6 GPa. A slow phase transition from α-LiAlH4 to a β phase was observed to occur between 2.2 and 3.5 GPa. The phase transition is reversible and a reverse transformation to α-LiAlH4 was observed below 1.4 GPa. Analysis of Raman spectra from β-LiAlH4 shows that they cannot be explained by the theoretically predicted α-NaAlH4-type structure with I41∕a symmetry. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.70.180101
DOI:
10.1103/PhysRevB.70.180101
PACS:
64.70.Kb, 81.30.Hd, 07.35.+k
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