Syntheses and crystal structures of the quaternary uranium lanthanide oxyselenides UYb 2O 2Se 3 and U 2Ln 2O 4Se 3 (Ln=Pr, Sm, Gd)

Adam D. Raw, James A Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Single crystals of the new uranium lanthanide oxyselenide compounds UYb 2O 2Se 3 and U 2Ln 2O 4Se 3 (Ln=Pr, Sm, Gd) have been synthesized from an Sb 2Se 3 flux. The structures have been determined from single-crystal X-ray diffraction data. UYb 2O 2Se 3 is isostructural to UYb 2O 2S 3. The structure comprises layers of edge-sharing YbSe 6 octahedra and double layers of disordered (U/Ln)O 4Se 4 square antiprisms. The U 2Ln 2O 4Se 3 (Ln=Pr, Sm, Gd) compounds are isostructural to U 2Ln 2O 4S 3 (Ln=LaGd) whose structure had been deduced previously from X-ray powder diffraction data. In the structure a dodecahedron of four O atoms and four Se atoms surrounds a site primarily occupied by U and a distorted bicapped octahedron of five Se atoms and three O atoms surrounds a site primarily occupied by the lanthanide. These compounds represent the first examples of quaternary uranium oxyselenides.

Original languageEnglish (US)
Pages (from-to)177-181
Number of pages5
JournalJournal of Solid State Chemistry
Volume186
DOIs
StatePublished - Feb 1 2012

Keywords

  • Actinides
  • Flux synthesis
  • Mixed-anion compounds
  • Uranium lanthanide oxyselenides
  • X-ray crystal structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Syntheses and crystal structures of the quaternary uranium lanthanide oxyselenides UYb <sub>2</sub>O <sub>2</sub>Se <sub>3</sub> and U <sub>2</sub>Ln <sub>2</sub>O <sub>4</sub>Se <sub>3</sub> (Ln=Pr, Sm, Gd)'. Together they form a unique fingerprint.

Cite this