Cover illustration: A view of the two-dimensional hydrogen-bonded network of 4-carboxyanilinium bromide parallel to the (010) plane, showing the aggregation of three hydrogen-bonding motifs. Hydrogen bonds are drawn as thin lines and C-bound H atoms have been omitted. See Cincic & Kaitner [Acta Cryst. (2008), C64, o226-o229].
The Cu6P(Se0.7S0.3)5Br cubic structure is built from a [P(Se0.7S0.3)5Br] framework in which CuI ions are distributed in various tetrahedral, triangular and linear sites. The compound is a solid solution of two efficient ionic conductors, namely Cu6PSe5Br and Cu6PS5Br, in which high ionic conductivity results from order–disorder phenomena in the copper substructure.
The title compound contains a unique framework of LiO4 and VO4 tetrahedra, which are linked to produce porous double layers separated along the c direction by isolated chains of face-sharing LiCl6 octahedra. Within the layers, six-tetrahedron Li2V4O18 rings form large channels filled by Ba2+ and Cl− ions.