Figure 4
(a) The layer around z = of [BO3]-connected `Zn6 cages' in the [001] projection. (b) A sequence of layers along the c axis. In the higher layers, only the Zn1 and O1 atoms are drawn. Key: large grey spheres B, small grey spheres Zn, large white spheres O, small white spheres H and polyhedra [ZnO4]. |