Synthesis and characterization of eight compounds of the MU 8Q17 family: ScU8S17, CoU 8S17, NiU8S17, TiU 8Se17, VU8Se17, CrU 8Se17, CoU8Se17, and NiU 8Se17

Matthew D. Ward, Adel Mesbah, Stefan G. Minasian, David K. Shuh, Tolek Tyliszczak, Minseong Lee, Eun Sang Choi, Sébastien Lebègue, James A Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

The solid-state MU8Q17 compounds ScU 8S17, CoU8S17, NiU8S 17, TiU8Se17, VU8Se17, CrU8Se17, CoU8Se17, and NiU 8Se17 were synthesized from the reactions of the elements at 1173 or 1123 K. These isostructural compounds crystallize in space group C2h 3 - C2/m of the monoclinic system in the CrU 8S17 structure type. X-ray absorption near-edge structure spectroscopic studies of ScU8S17 indicate that it contains Sc3+, and hence charge balance is achieved with a composition that includes U3+ as well as U4+. The other compounds charge balance with M2+ and U4+. Magnetic susceptibility measurements on ScU8S17 indicate antiferromagnetic couplings and a highly reduced effective magnetic moment. Ab Initio calculations find the compound to be metallic. Surprisingly, the Sc-S distances are actually longer than all the other M-S interactions, even though the ionic radii of Sc3+, low-spin Cr2+, and Ni2+ are similar.

Original languageEnglish (US)
Pages (from-to)6920-6927
Number of pages8
JournalInorganic Chemistry
Volume53
Issue number13
DOIs
Publication statusPublished - Jul 7 2014

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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