Complex hydrides studied by Raman spectroscopy and thermal conductivity measurements under high pressure

• The pressure-temperature phase diagrams of alkali metal alanates and borohydrides are of large current interest, and we have recently studied phase transformations under pressure in several of these materials. We here report Raman studies of KBH4 under pressure at room temperature, showing a phase transition near 6 GPa. Although no structural information is yet available, the similarity between KBH4 and NaBH4 suggests the new structure is orthorhombic. We also report studies on LiBH4 showing that the high pressure phase of this material is metastable to zero pressure below 200 K.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Nyckelord

Hydrides

hydrogen storage

vätelagring

LiBH4

KBH4

NaBH

high pressure

Raman spectroscopy

thermal conductivity

phase diagram

phase transition

density

metastability

Condensed matter physics

Kondenserade materiens fysik

fysik

Physics

Publikations- och innehållstyp

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