High pressure X-ray diffraction study on icosahedral boron arsenide (B 12As2)

Jianzhe Wu, Hongyang Zhu, Dongbin Hou, Cheng Ji, C. E. Whiteley, J. H. Edgar, Yanzhang Ma

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The high pressure properties of icosahedral boron arsenide (B 12As2) were studied by in situ X-ray diffraction measurements at pressures up to 25.5 GPa at room temperature. B 12As2 retains its rhombohedral structure; no phase transition was observed in the pressure range. The bulk modulus was determined to be 216 GPa with the pressure derivative 2.2. Anisotropy was observed in the compressibility of B12As2c-axis was 16.2% more compressible than a-axis. The boron icosahedron plays a dominant role in the compressibility of boron-rich compounds.

Original languageEnglish
Pages (from-to)144-146
Number of pages3
JournalJournal of Physics and Chemistry of Solids
Issue number2
StatePublished - Feb 2011


  • C. High pressure
  • C. X-ray diffraction
  • D. Equation-of-state


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