Syntheses and Structure of Er6Co2.19(1)In0.81(1) |
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Authors: | Vasyl’ I Zaremba Yaroslav M Kalychak Mariya V Dzevenko Ute Ch Rodewald Rolf-Dieter Hoffmann Rainer Pöttgen |
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Institution: | Inorganic Chemistry Department, Ivan Franko National University, Lviv, Ukraine Institut für Anorganische und Analytische Chemie, Westf?lische Wilhelms-Universit?t Münster, Münster, Germany
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Abstract: | Summary. The erbium–cobalt–indide Er6Co2.19(1)In0.81(1) was prepared by arc-melting of the pure elements. Single crystals were obtained through a special annealing procedure. Er6Co2.19(1)In0.81(1) crystallizes with the orthorhombic Ho6Co2Ga structure: Immm, a = 934.3(1), b = 936.4(1), c = 985.4(1) pm, wR2 = 0.0557, 892 F
2 values, and 35 variable parameters. The structure contains two gama;crystallographically independent Co2 dumb-bells at Co–Co distances of 223 and 236 pm, respectively. Further structural motifs are distorted octahedral Er6 clusters (336–401 pm Er–Er) which are condensed to a three-dimensional network via all corners. The In2 atoms have a distorted icosahedral erbium coordination (329–355 pm In2–Er). These icosahedra show an
orthorhombically distorted bcc packing. |
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Keywords: | , Indium compounds, Intermetallics, Crystal chemistry, |
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