Cover illustration: The crystal structure and atom-labeling scheme of methyl -allolactoside [methyl -D-galactopyranosyl-(16)--D-glucopyranoside] monohydrate. Displacement ellipsoids are depicted at the 50% probability level. See Klepach, Reed, Noll, Oliver & Serianni [Acta Cryst. (2009), C65, o562-o564].
The monoclinic compound Cr1.45Tl1.87Mo15Se19 represents a variant of the hexagonal In3Mo15Se19 structure type containing an equal mixture of Mo6Se8Se6 and Mo9Se11Se6 cluster units. The main difference concerns the occupation of a supplementary Cr site at the mid-point of the a axis in the new quaternary compound.
In KNi5[P6B6O23(OH)13], 12-membered borophosphate rings with K+ ions at the centers are linked by linear trimers of face-sharing [NiO6] octahedra and single [NiO6] octahedra to form a mixed anionic framework.