Ternary rare earth silicides RE2M3Si4 (RE = Sc, Y, Lu; M = Mo, W): Crystal structure, coloring and electronic properties

Morten B. Nielsen, Weiwei Xie, Robert Joseph Cava

Research output: Contribution to journalArticle

Abstract

The ternary compounds Sc2Mo3Si4, Y2Mo3Si4, Lu2Mo3Si4 and Sc2W3Si4 have been synthesized using arc melting and structurally characterized using single crystal X-ray diffraction. The compounds are isostructural with Gd5Si4 but with coloring (order of the rare earth and transition metals) on the Gd site. In contrast to group 4 and 5 ternaries of the same type, we observe no site mixing between the rare earth and transition metals. The Y compound displays a different, less common coloring from the others and through DFT calculations and investigation of the solid solution between Sc2Mo3Si4 and Y2Mo3Si4 it is shown that the different coloring of the latter is only marginally more stable. The electronic structures of the ternary compounds have been investigated using DFT calculations, yielding densities of states very similar to Gd5Si4. These predict metallic behavior and no magnetism, which is confirmed through resistivity and magnetization measurements.

Original languageEnglish (US)
Pages (from-to)3771-3777
Number of pages7
JournalDalton Transactions
Volume45
Issue number9
DOIs
StatePublished - Jan 1 2016

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

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