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Redetermination of the crystal structure of β-zinc molybdate from single-crystal X-ray diffraction data

AutorMtioui-Sghaier, Olfa; Mendoza-Meroño, R.; Ktari, Lilia; Dammak, Mohamed; García-Granda, Santiago
Palabras claveCrystal structure
Wolframite structure type
Hydro­thermal synthesis
Fecha de publicación2015
EditorInternational Union of Crystallography
CitaciónActa Crystallographica Section E: Crystallographic Communications 71(7): i6-i7 (2015)
ResumenThe crystal structure of the β-polymorph of ZnMoO4 was re-determined on the basis of single-crystal X-ray diffraction data. In comparison with previous powder X-ray diffraction studies [Katikaneani & Arunachalam (2005 ▸). Eur. J. Inorg. Chem. pp. 3080–3087; Cavalcante et al. (2013 ▸). Polyhedron, 54, 13–25], all atoms were refined with anisotropic displacement parameters, leading to a higher precision with respect to bond lengths and angles. β-ZnMoO4 adopts the wolframite structure type and is composed of distorted ZnO6 and MoO6 octa­hedra, both with point group symmetry 2. The distortion of the octa­hedra is reflected by variation of bond lengths and angles from 2.002 (3)–2.274 (4) Å, 80.63 (11)–108.8 (2)° for equatorial and 158.4 (2)– 162.81 (14)° for axial angles (ZnO6), and of 1.769 (3)–2.171 (3) Å, 73.39 (16)–104.7 (2), 150.8 (2)–164.89 (15)° (MoO6), respectively. In the crystal structure, the same type of MO6 octa­hedra share edges to built up zigzag chains extending parallel to [001]. The two types of chains are condensed by common vertices into a framework structure. The crystal structure can alternatively be described as derived from a distorted hexa­gonally closed packed arrangement of the O atoms, with Zn and Mo in half of the octa­hedral voids.
DescripciónThis is an open-access article distributed under the terms of the Creative Commons Attribution Licence.
Versión del editorhttp://dx.doi.org/10.1107/S205698901501186X
Identificadoresdoi: 10.1107/S205698901501186X
e-issn: 2056-9890
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