Figure 5
(Top) Packing of the three layers in forms II and III, viewed along the relative c axis, the central layer is green for the visualization of the different packing; the two structures are rotated and viewed along the a axis in form II (bottom left) and along the equivalent crystallographic axis in the monoclinic structure found of phase III where the shift of the pink layers is evident (bottom right). The unit-cell axes are coloured red (a), green (b) and blue (c). |