Fig. 9.

Water density profiles for OW (solid) and HW (dashed) atoms as a function of distance from the centre of the pore, at 298 K (a) and 210 K (b). Also shown (dotted) is a horizontal line corresponding to the average density in the range r = 0–4 Å at each temperature. This density is called the “core” density. The dot–dash line shows a simulation of ice Ih with the ice c-axis aligned with the cylindrical pore axis and the centre of hexagon at the centre of the pore.