2025/05/21 by Pablo Botella, Daniel Díaz-Anichtchenko, Robert Oliva +5 · 1 voice
Earth and Planetary Sciences · Physics and Astronomy · #Advanced Condensed Matter Physics #Atomic and Subatomic Physics Research #High-pressure geophysics and materials
paper · doi:10.1016/j.nxmate.2025.100735
openalex publication_date 2025/05/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
In situ powder synchrotron X-ray diffraction measurements were conducted on YBiO 3 and YbBiO 3 under high-pressures up to approximately 20 GPa at room temperature. Although the compounds have similar compositions they crystallize in different structures, viz. YBiO 3 , has cubic fluorite-type lattice related to δ-Bi 2 O 3 while YbBiO 3 has triclinic lattice but closely related to the former. Both compounds were found to exhibit pressure-induced amorphization around 16 GPa, consistent with the behavior observed in other bismuth-based oxides. The evolution of lattice parameters and volume under pressure was determined for both YBiO 3 and YbBiO 3 , and the obtained bulk moduli were: 59(3) and 181–254 GPa, respectively. The bulk modulus of YbBiO 3 was also found to be dependent on the sample loading and compression method which can affect the inherent distortion of the lattice. Additionally, the estimated bulk modulus is discussed by highlighting the influence of the lone pair of electrons in Bi 3+ ions. These findings are discussed in the context of other bismuth-based compounds and the role of the lone pair of electrons, relevant to their applications as optical and photocatalytic materials.