Pressure-induced transformations of molecular boron hydride

S Nakano, RJ Hemley, EA Gregoryanz, AF Goncharov, HK Mao

Research output: Contribution to journalArticlepeer-review

Abstract

Decaborane, a molecular boron hydride, was compressed to 131 GPa at room temperature to explore possible non-molecular phases in this system and their physical properties. Decaborane changed its colour from transparent yellow to orange/red above 50 GPa and then to black above 100 GPa, suggesting some transformations. Raman scattering and infrared (IR) absorption spectroscopy reveal significant structural changes, Above 100 GPa, B-B skeletal, B-H and B-H-B Raman/IR peaks gradually disappeared, which implies a transformation into a non-molecular phase in which conventional borane-type bonding is lost. The optical band gap of the material at 100 GPa was estimated to be about 1.0 eV.

Original languageEnglish
Article numberPII S0953-8984(02)38847-7
Pages (from-to)10453-10456
Number of pages4
JournalJournal of Physics: Condensed Matter
Volume14
Issue number44
Publication statusPublished - 11 Nov 2002

Keywords

  • TRANSITIONS
  • HYDROGEN
  • PHASE

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