Figure 1
Geometry of an octahedron in the main layer of layered single and double hydroxides. The original projection was viewed along b with c up the page but for illustrative purposes it has been rotated around the c axis by ~ 25° and tilted down by ~ 10°. The circles labelled `O' represent the O atoms of hydroxyl ions at the vertices of the octahedron and the circle labelled `M' is the metal ion at the centre.  [article HTML]