Figure 1 Polyhedral representation of the crystal structure of (I) in a view along [00]. Displacement ellipsoids are represented at the 90% probability level. Colour codes for polyhedra: Co in tetrahedral coordination is turquoise, Co2 in octahedral coordination is blue, mixed (In,Co) sites in octahedral coordination are pink, antimonate octahedra are green and silicate tetrahedra are red.