High-pressure reactions between the pnictogens the rediscovery of BiN

K Glazyrin*, A Aslandukov, A Aslandukova, T Fedotenko, S Khandarkhaeva, D Laniel, M Bykov, L Dubrovinsky

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We explore chemical reactions within pnictogens with an example of bismuth and nitrogen under extreme conditions. Understanding chemical reactions between Bi and N, elements representing the first and the last stable elements of the nitrogen group, and the physical properties of their compounds under ambient and high pressure is far from being complete. Here, we report the high-pressure high-temperature synthesis of orthorhombic Pbcn BiN (S.G. #60) from Bi and N2 precursors at pressures above 40 GPa. Using synchrotron single-crystal X-ray diffraction on the polycrystalline sample, we solved and refined the compound’s structure and studied its behavior and compressibility on decompression to ambient pressure. We confirm the stability of Pbcn BiN to pressures as low as 12.5(4) GPa. Below that pressure value, a group–subgroup phase transformation occurs, resulting in the formation of a non-centrosymmetric BiN solid with a space group Pca21 (S.G. #29). We use ab initio calculations to characterize the polymorphs of BiN. They also provide support and explanation for our experimental observations, in particular those corresponding to peculiar Bi–N bond evolution under pressure, resulting in a change in the coordination numbers of Bi and N as a function of pressure within the explored stability field of Pbcn BiN.
Original languageEnglish
Article number1257942
Pages (from-to)1-10
Number of pages10
JournalFrontiers in chemistry
Volume11
DOIs
Publication statusPublished - 12 Oct 2023

Keywords / Materials (for Non-textual outputs)

  • X-ray diffraction
  • Binary nitrides
  • Diamond anvil cell
  • High-pressure chemistry
  • High-pressure synthesis
  • Pnictogens
  • Single crystal

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