Also, at a temperature of 90 K, the structural transitions derived from walking the osmotic potential along the kinetic pathway during adsorption and desorption agree quantitatively with previously reported in situ powder X-ray diffraction experiments. The volumes identified in experiments at 90 K (Figure ) indicate an op → cp and cp → op transition during adsorption and an op → cp transition during desorption. These same transitions are obtained from the constructed osmotic landscape, at methane gas pressures in quantitative agreement with experiments (Figure ). The predicted framework contracting transitions occur to a volume of 62 nm 3 , as this state is predicted to be 19 kJ mol -1 more stable than the state at 50 nm 3 . Deviations of energies at this relatively small scale compared to the absolute osmotic energies can likely be attributed to the underlying force field description of the framework. The presence of intermediate phases between the op and cp phases at approximately 2 kPa is also observed in experiments and, importantly, only during desorption and not adsorption. The relative flatness of the osmotic landscape at this gas pressure is responsible for these intermediate phases.