Regarding the water in channels, the graphical abstract by Seoung et al., 2013, shows that the "superhydrated zeolite, K16Al16Si24O80⋅32 H2O, undergoes a unique transformation above 2.5 GPa whereby the potassium ions interchange their locations with those of water, whereas the elliptical channel reverts its major-minor axes, resembling a "chatterbox motion" (see graphics). Alkali-metalexchanged natrolites under pressure reveal structural changes that far exceed what can be achieved by varying temperature and chemical composition" [for the chatterbox motion, see please video about origami, for instance this one].