Figure 8

Considering an theoretical incommensurate modulation along c* from \(\gamma =0\) to \(\gamma =\frac{1}{2}\), the possible stackings can be described following a Farey tree hierarchy40 using the stacking of the basic bricks (2*5M, 6M, 8M, etc...) and the two “end members” 4M and 2O. The possible macroscopic ordered sequences observed at 300 K are within the yellow range of γ.