Cover illustration: The C-H and - interactions in the structure of N-(4-acetylphenyl)benzenesulfonamide. See Fernandes, Aragão, Martins, Noda-Perez, Lariucci & Napolitano [Acta Cryst. (2011), C67, o226-o229].
The structure of Ba3Y2B6O15 is composed of isolated [B2O5]4− groups, irregular BaO9 polyhedra and regular YO6 polyhedra which occupy alternate sites running along the  direction. Irregular BaO9 polyhedra and regular YO6 polyhedra construct a three-dimensional framework, which is reinforced by [B2O5]4− groups.
The structure of the rhombohedral form of EuNi5In consists of CaCu5 (EuNi5)-, MgCu2 (InNi2)- and NiAs (EuNi)-type slabs in a 1:2:1 ratio. The structure features a two-dimensional network of 2∞[Ni8] tetrahedral clusters arranged in the ab plane.