LiLa6I12Os, a substitutional derivative of rhombohedral La(La6I12Os) |
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Authors: | Elizabeth A. Jensen |
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Affiliation: | Department of Chemistry, Iowa State University, Room 353, Spedding Hall, Ames, IA 50011-3020, USA |
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Abstract: | The series of quaternary rare-earth-metal halide cluster compounds ALa6I12Z with transition metal interstitials Z and alkali or alkaline-earth metal cations A has been expanded to include A=Li. The compounds synthesized by high-temperature solid-state techniques for Z=Os, Ir, Pt, Ru are isotypic with rhombohedral R7X12Z (, Z=3). The refined single X-ray crystal structure of (Li0.967La0.033)La6I12Os is reported, along with supportive results from a Rietveld analysis of neutron powder diffraction from a different sample, 7Li MAS-NMR, and electronic resistivity and magnetic susceptibility measurements. The samples show continuous Li1−xLax cation compositions and are generally semiconductors, but their complex paramagnetic properties are not those of simple spin-only systems. |
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Keywords: | Rhombohedral LiLa6I12Os Semiconductors |
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