Chemistry - A European Journal
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Editor: Neville Compton, Deputy Editors: Anne Deveson, Elisabeth Roedern
Impact Factor: 5.771
ISI Journal Citation Reports © Ranking: 2015: 24/163 (Chemistry Multidisciplinary)
Online ISSN: 1521-3765
Associated Title(s): Angewandte Chemie International Edition, Chemistry – An Asian Journal, ChemistryOpen, ChemistrySelect, ChemBioChem, ChemCatChem, ChemElectroChem, ChemMedChem, ChemPhysChem, ChemPlusChem, ChemSusChem, European Journal of Inorganic Chemistry, European Journal of Organic Chemistry
The cover picture shows an illustration of the crystal structure of Ce4[Si4O4N6]O (Ce: red, O: blue, N: green, Si: at the center of the dark green tetrahedra) with a specifically adopted periodic nodal surface (PNS). This infinite hyperbolically corrugated PNS divides the space into two independent sub-spaces. Topologically, there is no path from the gray to the yellow side of the surface. The hyperbolically corrugated layer structure of condensed Q3 type SiON3 tetrahedra in Ce4[Si4O4N6]O extends along the yellow side of the surface with the bonds Si−O piercing the PNS and the [Ce4O]10+ ions situated on the gray side of the surface. Here the application of a periodic nodal surface turns out to be an elegant way for the description of the first hyperbolical layer silicate structure. From a topological point of view the structure of Ce4[Si4O4N6]O is much more complex than the simple situation of an ideal single-layer silicate with an infinite number of parallel silicate sheets. This work is described in more detail by W. Schnick et al. on p. 2714 ff.