Title
High-pressure U3O8 with the fluorite-type structure
Document Type
Article
Publication Date
5-1-2014
Abstract
A new high-pressure phase of U3O8, which has a fluorite-type structure, forms at pressures greater than ~8.1 GPa that was confirmed by in situ x-ray diffraction (XRD) measurements. The fluorite-type U3O8 is stable at pressures at least up to ~40 GPa and temperatures to 1700 K, and quenchable to ambient conditions. Based on the XRD analysis, there is a huge volume collapse (>20%) for U3O 8 during the phase transition and the quenched high-pressure phase is 28% denser than the initial orthorhombic phase at ambient conditions. The high-pressure phase has a very low compressibility comparing with the starting orthorhombic phase. © 2014 Elsevier Inc.
Publication Source (Journal or Book title)
Journal of Solid State Chemistry
First Page
110
Last Page
115
Recommended Citation
Zhang, F., Lang, M., Wang, J., Li, W., Sun, K., Prakapenka, V., & Ewing, R. (2014). High-pressure U3O8 with the fluorite-type structure. Journal of Solid State Chemistry, 213, 110-115. https://doi.org/10.1016/j.jssc.2014.02.012
