FIGURE 3. The frameworks of ZIF-95 and ZIF-100 shown as natural tilings27.
From the following article:
Colossal cages in zeolitic imidazolate frameworks as selective carbon dioxide reservoirs
Bo Wang, Adrien P. Côté, Hiroyasu Furukawa, Michael O'Keeffe & Omar M. Yaghi
Nature 453, 207-211(8 May 2008)
doi:10.1038/nature06900
a, Natural tiling of ZIF-95; the A and B cages are shown in blue and yellow, respectively. b, Natural tiling of ZIF-100; the giant cage is in yellow.