Syntheses and characterization of the actinide manganese selenides ThMnSe3 and UMnSe3

Ismail Ijjaali, Kwasi Mitchell, Fu Qiang Huang, James A. Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


The AnMnSe3 (An=Th, U) compounds were synthesized from high-temperature solid-state reactions of the constituent elements at 1223 and 1273K, respectively. Both compounds are isostructural with UFeS3 and crystallize in the space group Cmcm of the orthorhombic system with four formula units in a cell. Cell constants (Å) at 153K are: ThMnSe 3, 4.0304(4), 12.795(1), 9.2883(9); UMnSe3, 3.931(5), 12.705(14), 9.148(10). The structure comprises layers of MnSe6 octahedra that alternate with layers of AnSe8 bicapped trigonal prisms along the b-axis. Because there are no Se-Se bonds in the structure of AnMnSe3 the formal oxidation states of An/Mn/Se are 4+/2+/2-. UMnSe3 is a ferromagnet with TC=62K.

Original languageEnglish (US)
Pages (from-to)257-261
Number of pages5
JournalJournal of Solid State Chemistry
Issue number1
StatePublished - Jan 2004


  • Crystal structure
  • Ferromagnet
  • Solid-state compound
  • Synthesis
  • Thorium manganese selenide
  • Uranium manganese selenide

ASJC Scopus subject areas

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


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