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- Title
Die Europium(II)-Oxidhalogenide Eu<sub>2</sub>OBr<sub>2</sub> und Eu<sub>2</sub>OI<sub>2</sub>.
- Authors
Rudolph, Daniel; Schleid, Thomas
- Abstract
The syntheses and crystal structures of the two isotypic europium(II) oxide halides Eu2OBr2 and Eu2OI2 are reported. They crystallize orthorhombically in the space group Ibam (Z = 4; Eu2OBr2: a = 709.86(5), b = 1200.34(9), c = 628.71(4) pm; Eu2OI2: a = 739.78(5), b = 1295.13(9), c = 644.82(4) pm). The unit cell parameters presented here, and thus the interatomic distances of Eu2OI2, are significantly smaller than the ones reported in the literature, which is explained by the substitution of europium with larger barium cations due to the synthesis route described in the early study. Central building blocks of both crystal structures are trans-edge-connected [OEu4]6+ tetrahedra forming straight 1 ∞ {[OEue4/2 ]2+ } chains running parallel to the [001] direction. Bundled like a hexagonal rod packing, their interaction is achieved by Br- or I- anions for charge compensation.
- Publication
Zeitschrift für Naturforschung B: A Journal of Chemical Sciences, 2017, Vol 72, Issue 11, p795
- ISSN
0932-0776
- Publication type
Article
- DOI
10.1515/znb-2017-0097