Synthesis and structure of the scandium-rich indides Sc5Ni2In4 and Sc5Rh2In4

✍ Scribed by Mar'yana Lukachuk; Birgit Heying; Ute Ch. Rodewald; Rainer Pöttgen

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 120 KB
• Volume: 16
• Category: Article
• ISSN: 1042-7163
• DOI: 10.1002/hc.20106

✦ Synopsis

Abstract

The ternary indides Sc~5~ Ni~2~ In~4~ and Sc~5~ Rh~2~ In~4~ were synthesized by arc‐melting of the elements and subsequent annealing. A structural investigation by X‐ray powder and single crystal diffraction revealed: Lu~5~ Ni~2~ In~4~ type, Pbam, a = 1716.3(2), b = 755.1(1), c = 335.22(5) pm, wR2 = 0.0721, 844 F^2^ values for Sc~5~ Ni~2~ In~4~, and a = 1754.3(3), b = 765.0(1), c = 332.97(6) pm, wR2 = 0.0363, 1107 F^2^ values for Sc~5~ Rh~2~ In~4~ with 36 variables per refinement. Both structures can be described as intergrowths of distorted AlB~2~‐ and CsCl‐related slabs, where the transition metal (T) atoms have a trigonal prismatic and the indium atoms a distorted square prismatic coordination. The shortest interatomic distances occur for ScT and TIn. The crystal chemistry and chemical bonding in these intermetallics are briefly discussed. © 2005 Wiley Periodicals, Inc. Heteroatom Chem 16:364–368, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20106