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The Gold-rich Indide Eu 5 Au 17.7 In 4.3 and its Relation with the Structures of SrAu 4.76 In 1.24 and BaLi 4

The Gold-rich Indide Eu 5 Au 17.7 In 4.3 and its Relation with the Structures of SrAu 4.76 In... The gold-rich indide Eu 5 Au 17.7 In 4.3 was synthesized from the elements in a sealed tantalum ampoule that was heated in a high-frequency furnace. Eu 5 Au 17.7 In 4.3 crystallizes with a new monoclinic structure type: C2/m, a = 902.7(2), b = 722.8(3), c = 1734.1(4) pm, β = 94.31(3)°, wR2 = 0.0907, 2640 F 2 values and 74 variables. Eu 5 Au 17.7 In 4.3 has a pronounced gold substructure with Au-Au distances ranging from 278 to 300 pm. The striking structural motifs in the gold substructure are networks of Au6 hexagons and discrete units of corner- and edge-sharing Au 4 tetrahedra. Eu 5 Au 17.70 In 4.30 exhibits a small homogeneity range with In/Au mixing on two Wyckoff sites. Geometrically, the Eu 5 Au 17.7 In 4.3 structure can be explained as an intergrowth variant of slightly distorted SrAu 4.76 In 1.24 - and BaL i4 -related slabs. The europium coordination in the BaL i4 slabs is similar to binary EuAu 2 . http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Zeitschrift für Naturforschung B de Gruyter

The Gold-rich Indide Eu 5 Au 17.7 In 4.3 and its Relation with the Structures of SrAu 4.76 In 1.24 and BaLi 4

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References (6)

Publisher
de Gruyter
Copyright
Copyright © 2012 by the
ISSN
0932-0776
eISSN
1865-7117
DOI
10.1515/znb-2012-0202
Publisher site
See Article on Publisher Site

Abstract

The gold-rich indide Eu 5 Au 17.7 In 4.3 was synthesized from the elements in a sealed tantalum ampoule that was heated in a high-frequency furnace. Eu 5 Au 17.7 In 4.3 crystallizes with a new monoclinic structure type: C2/m, a = 902.7(2), b = 722.8(3), c = 1734.1(4) pm, β = 94.31(3)°, wR2 = 0.0907, 2640 F 2 values and 74 variables. Eu 5 Au 17.7 In 4.3 has a pronounced gold substructure with Au-Au distances ranging from 278 to 300 pm. The striking structural motifs in the gold substructure are networks of Au6 hexagons and discrete units of corner- and edge-sharing Au 4 tetrahedra. Eu 5 Au 17.70 In 4.30 exhibits a small homogeneity range with In/Au mixing on two Wyckoff sites. Geometrically, the Eu 5 Au 17.7 In 4.3 structure can be explained as an intergrowth variant of slightly distorted SrAu 4.76 In 1.24 - and BaL i4 -related slabs. The europium coordination in the BaL i4 slabs is similar to binary EuAu 2 .

Journal

Zeitschrift für Naturforschung Bde Gruyter

Published: Feb 1, 2012

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