Abstract
β-UPSe was synthesized from the reaction of U2Se3, P and Se in a CsCl flux in a fused-silica tube. It crystallizes with four formula units in the tetragonal space group I4/mmm in the UGeTe structure type. The asymmetric unit comprises one U (site symmetry 4mm), one Se (4mm), and one P (mmm.) atom. The U atom is coordinated in a monocapped square-antiprismatic arrangement, where the square face is formed by P atoms and the other five vertices are Se atoms. The P site is disordered about a mirror plane, showing half-ocupancy for each of the two resulting P atoms. The title structure is related to that of α-UPSe, which crystallizes with two formula units in the tetragonal space group P4/nmm in the PbFCl structure type.
Highlights
-UPSe was synthesized from the reaction of U2Se3, P and Se in a CsCl flux in a fused-silica tube. It crystallizes with four formula units in the tetragonal space group I4/mmm in the UGeTe structure type
The title structure is related to that of -UPSe, which crystallizes with two formula units in the tetragonal space group P4/nmm in the PbFCl structure type
SEM analyses were conducted in the Electron Probe Instrumentation Center (EPIC) at the Northwestern University Atomic and Nanoscale Characterization Experimental (NUANCE) Center, supported by the NSF-NSEC, the NSF-MRSEC, the Keck Foundation, the State of Illinois, and Northwestern University
Summary
Key indicators: single-crystal X-ray study; T = 298 K; mean (U–Se) = 0.001 A; disorder in main residue; R factor = 0.024; wR factor = 0.052; data-to-parameter ratio = 10.7. -UPSe was synthesized from the reaction of U2Se3, P and Se in a CsCl flux in a fused-silica tube. It crystallizes with four formula units in the tetragonal space group I4/mmm in the UGeTe structure type. The asymmetric unit comprises one U (site symmetry 4mm), one Se (4mm), and one P (mmm.) atom. The P site is disordered about a mirror plane, showing half-ocupancy for each of the two resulting P atoms. The title structure is related to that of -UPSe, which crystallizes with two formula units in the tetragonal space group P4/nmm in the PbFCl structure type
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Acta Crystallographica Section E Structure Reports Online
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
