The Β-polymorph of uranium phosphide selenide

George N. Oh, James A. Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Β-UPSe was synthesized from the reaction of U2Se 3, P and Se in a CsCl flux in a fused-silica tube. It crystallizes with four formula units in the tetra-gonal 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-anti-prismatic 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 tetra-gonal space group P4/nmm in the PbFCl structure type.

Original languageEnglish (US)
Pages (from-to)i75
JournalActa Crystallographica Section E: Structure Reports Online
Issue number12
StatePublished - Dec 2011


  • R factor = 0.024
  • T = 298 K
  • data-to-parameter ratio = 10.7
  • disorder in main residue
  • mean σ(U-Se) = 0.001Å
  • single-crystal X-ray study
  • wR factor = 0.052

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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