Figure 2
A projection of the Mo network and Sn atoms (unconnected ellipsoids) on the ac plane (O atoms omitted for clarity). Clusters whose centre lies in the plane y = 0 are represented by black lines, those whose centre is at y = 0.5 by a light grey line. Only Mo—Mo bonds of less than 2.9 Å are drawn. Sn atoms at y ∼ 0 and ∼ 0.5 are represented as black and grey ellipsoids, respectively (97% probability level). |