Pressure-temperature phase diagram of LiBH4: Synchrotron x-ray diffraction experiments and theoretical analysis
2008 (English)In: Physical Review B, ISSN 1098-0121, Vol. 77, no 17, 174112- p.Article in journal (Refereed) Published
An in situ combined high-temperature high-pressure synchrotron radiation diffraction study has been carried out on LiBH4. The phase diagram of LiBH4 is mapped to 10 GPa and 500 K, and four phases are identified. The corresponding structural distortions are analyzed in terms of symmetry-breaking atomic position shifts and anion ordering. Group-theoretical and crystal-chemical considerations reveal a nontrivial layered structure of LiBH4. The layers and their deformations define the structural stability of the observed phases.
Place, publisher, year, edition, pages
2008. Vol. 77, no 17, 174112- p.
Hydrogen storage, hydrides, high pressure, phase transitions, phase diagram, lattice structures, LiBH4, X-ray diffraction, thermal conductivity, differential thermal analysis, group theory, order parameters, Landau theory
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:umu:diva-9686DOI: doi:10.1103/PhysRevB.77.174112OAI: oai:DiVA.org:umu-9686DiVA: diva2:149357
ISSN 1550-235X online. Selected as "Editor's Suggestion", as a paper of particular interest, importance, and clarity.2008-05-202008-05-202011-01-10Bibliographically approved