The high-pressure compressibility of B12P2

Yang Gao, Mi Zhou, Haiyan Wang, Cheng Ji, C. E. Whiteley, J. H. Edgar, Haozhe Liu, Yanzhang Ma

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In situ high pressure synchrotron X-ray diffraction measurements were performed on icosahedral boron phosphide (B12P2) to 43.2 GPa. No structural phase transition occurs over this pressure range. The bulk modulus of B12P2 is KOT=207±7GPa with pressure derivative of K'OT=6.6±0.8. The structure is most compressible along the chain formed by phosphorus and boron atoms in the crystal structure. It is believed that the compressibility of boron-rich compounds at close to ambient pressure is determined by the boron icosahedral structure, while the inclusive atoms (both boron and non-boron) between the icosahedra determine the high-pressure compressibility and structure stability.

Original languageEnglish
Pages (from-to)21-26
Number of pages6
JournalJournal of Physics and Chemistry of Solids
StatePublished - Mar 1 2017


Cite this

Gao, Y., Zhou, M., Wang, H., Ji, C., Whiteley, C. E., Edgar, J. H., Liu, H., & Ma, Y. (2017). The high-pressure compressibility of B12P2. Journal of Physics and Chemistry of Solids, 102, 21-26.