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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Acceso en línea: | https://arxiv.org/abs/2508.05617 |
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| _version_ | 1866915433884418048 |
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| author | Karaca, E. Santamaria-Perez, D. Otero-de-la-Roza, A. Oliva, R. Rao, K. S. Achary, S. N. Popescu, C. Errandonea, D. |
| author_facet | Karaca, E. Santamaria-Perez, D. Otero-de-la-Roza, A. Oliva, R. Rao, K. S. Achary, S. N. Popescu, C. Errandonea, D. |
| contents | We present a study of the high-pressure behaviour Bi14WO24, a high oxide ion conductor member of the Bi2O3-WO3 binary system. The tetragonal polymorph of Bi14WO24 was studied under high-pressure conditions using synchrotron powder X-ray diffraction. It was found that in contrast to isostructural Bi14CrO24 and Bi14MoO24 which experience a phase transition around 5 GPa, in our study Bi14WO24 undergoes an irreversible chemical decomposition into Bi2O3 and WO3 at 2.85(5) GPa. The pressure dependence of the unit-cell parameters of Bi14WO24 was also determined, and hence the linear compressibility along different axes and room-temperature pressure-volume equation of state were derived. Bulk modulus of tetragonal Bi14WO24 was found to be 49.8(2.6) GPa, and the linear compressibility of the two crystallographic axes, \k{appa}a and \k{appa}c were 6.94(2) 10-3 GPa-1 and = 3.73(1) 10-3 GPa-1, respectively. The pressure induced decomposition can be attributed to the favourable increasing density of the system to accommodate the pressure induced stress. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_05617 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Pressure-induced decomposition of Bi14WO24 Karaca, E. Santamaria-Perez, D. Otero-de-la-Roza, A. Oliva, R. Rao, K. S. Achary, S. N. Popescu, C. Errandonea, D. Materials Science Applied Physics We present a study of the high-pressure behaviour Bi14WO24, a high oxide ion conductor member of the Bi2O3-WO3 binary system. The tetragonal polymorph of Bi14WO24 was studied under high-pressure conditions using synchrotron powder X-ray diffraction. It was found that in contrast to isostructural Bi14CrO24 and Bi14MoO24 which experience a phase transition around 5 GPa, in our study Bi14WO24 undergoes an irreversible chemical decomposition into Bi2O3 and WO3 at 2.85(5) GPa. The pressure dependence of the unit-cell parameters of Bi14WO24 was also determined, and hence the linear compressibility along different axes and room-temperature pressure-volume equation of state were derived. Bulk modulus of tetragonal Bi14WO24 was found to be 49.8(2.6) GPa, and the linear compressibility of the two crystallographic axes, \k{appa}a and \k{appa}c were 6.94(2) 10-3 GPa-1 and = 3.73(1) 10-3 GPa-1, respectively. The pressure induced decomposition can be attributed to the favourable increasing density of the system to accommodate the pressure induced stress. |
| title | Pressure-induced decomposition of Bi14WO24 |
| topic | Materials Science Applied Physics |
| url | https://arxiv.org/abs/2508.05617 |