High pressure phase transition in LiBH4

• The high-pressure phase transition from ambient pressure alpha-LiBH4 to high-pressure beta-LiBH4 was observed by Raman spectroscopy and X-ray diffraction between 0.8 and 1.1 GPa. The phase boundary between these two phases was mapped over a large range of temperatures using thermal conductivity studies and differential thermal analysis. The structure of the high-pressure phase could not be identified due to small number of experimentally observed reflections, but it was shown that it is different from previously reported theoretical predictions.

Nyckelord

high pressure

LiBH4

borohydrides

phase transition

phase diagram

Raman spectroscopy

hydrogen storage

NATURAL SCIENCES Physics Condensed matter physics

NATURVETENSKAP Fysik Kondenserade materiens fysik

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art (ämneskategori)

ref (ämneskategori)