Sc14Co3.10In2.59 – the representative of the Lu14Co3In3 type with the smallest rare earth element
Author:
Gulay Nataliya L.1, Kalychak Yaroslav M.2, Pöttgen Rainer1
Affiliation:
1. Institut für Anorganische und Analytische Chemie, Universität Münster , Corrensstrasse 30, 48149 Münster , Germany 2. Department of Analytical Chemistry , Ivan Franko National University of Lviv , Kyryla i Mefodiya Street 6 , 79005 Lviv , Ukraine
Abstract
Abstract
The scandium-rich phase Sc14Co3.10In2.59 has been synthesized by a direct reaction of the elements in a sealed tantalum ampoule in a high-frequency furnace. Single crystals were obtained by slow cooling of the product. The Sc14Co3.10In2.59 structure was refined from single-crystal X-ray diffractometer data: Lu14Co3In3 type, P42/nmc, a = 889.13(13), c = 2138.7(4) pm, wR2 = 0.0483, 1636 F
2 values, and 64 variables. Sc14Co3.10In2.59 completes the series of the rare earth metal-rich phases RE
14Co3In3. The structure refinement revealed defects on the Co1 site (84.7(5)% occupancy on 8g) and a mixed occupancy of 59.1(7)% In1/40.9(7)% Co3 on the 4c site. The structure is built up by a dense condensation of Co@Sc6 trigonal prisms and In2@InSc11 and In1/Co2@Co2Sc10 icosahedra. An interpenetration of the In2@InSc11 icosahedra leads to dumb-bell formation with an In2–In2 distance of 289 pm. The Sc14Co3.10In2.59 structure is stabilized by substantial Sc–Sc bonding (316–360 pm Sc–Sc).
Funder
Deutscher Akademischer Austauschdienst
Publisher
Walter de Gruyter GmbH
Subject
General Chemistry
Reference41 articles.
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