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Complex Hydrides Studied by Raman Spectroscopy and Thermal Conductivity Measurements under High Pressure

Published online by Cambridge University Press:  26 February 2011

Bertil Sundqvist ,
Alexandr V. Talyzin  and
Ove Andersson
Bertil Sundqvist
Affiliation:
bertil.sundqvist@physics.umu.se, Umeå University, Department of Physics, Linnaeus Vag 20, Umeå, S-90187, Sweden, +46 90 786 7488
Alexandr V. Talyzin
Affiliation:
alexandr.talyzin@physics.umu.se, Umeå University, Department of Physics, Umeå, S-90187, Sweden
Ove Andersson
Affiliation:
ove.andersson@physics.umu.se, Umeå University, Department of Physics, Umeå, S-90187, Sweden
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Abstract

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.

Keywords

energy-storageHphase transformation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 971: Symposium Z – Hydrogen Storage Technologies , 2006 , 0971-Z07-03
Copyright
Copyright © Materials Research Society 2007

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References

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