Cover illustration: The molecular structure of methanol(phthalocyaninato)magnesium(II), drawn with 50% probability displacement ellipsoids, showing a near-perfect square-pyramidal geometry at magnesium. See Guzei, McGaff & Kieler [Acta Cryst. (2005), C61, m472-m475].
Ga(IO3)3 crystallizes in the space group P63, with the Ga atom at a site with imposed threefold symmetry. The crystal structure consists of slightly distorted GaO6 octahedra that are bridged by the I atoms of IO3− groups, giving rise to a three-dimensional polar network.
The crystal structures of K2nCoMo2+nO7+4n compounds are compared for n = 2, 3 and 5. All are built up from face-sharing [MoO6] and [CoO6] octahedra, the latter sharing corners with six [MoO4] tetrahedra, which differ in the connectivity of the octahedral units via the tetrahedra.