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Complex hydrides studied by Raman spectroscopy and thermal conductivity measurements under high pressure
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
2006 (English)In: Hydrogen Storage Technologies: Proceedings of Symposium Z at the 2006 MRS Fall Meeting, Boston, MA, USA; Materials Research Society Symposium Proceedings vol. 971E, Warrendale: Materials Research Society , 2006, 7-12 p.Conference paper, Published paper (Refereed)
Abstract [en]

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.

Place, publisher, year, edition, pages
Warrendale: Materials Research Society , 2006. 7-12 p.
Series
Materials Research Society Symposium Proceedings, ISSN 0272-9172 ; 971
Keyword [en]
Hydrides, hydrogen storage, vätelagring, LiBH4, KBH4, NaBH, high pressure, Raman spectroscopy, thermal conductivity, phase diagram, phase transition, density, metastability
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-16947OAI: oai:DiVA.org:umu-16947DiVA: diva2:156620
Note
Denna volym publiceras endast i elektronisk form; E-paper 0971-Z07-03.Available from: 2007-10-22 Created: 2007-10-22 Last updated: 2010-01-15Bibliographically approved

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http://www.mrs.org/s_mrs/bin.asp?CID=8709&DID=193927&DOC=FILE.PDF

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Sundqvist, BertilTalyzin, AlexandrAndersson, Ove

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