Overall, the experimental results correlate very well with the observations from the ADTA CSP energy landscape: structures with 5-, 4-, 3-and 2-fold interpenetration of diamondoid hydrogen bonding networks all fall along the low energy, leading edge of the energy-density distribution of structures and are all observed experimentally, whereas the non-interpenetrated structure is not in a stable region of the energy landscape and has not been observed. Furthermore, of those levels of interpenetration that are observed, only the 5-fold and 4fold structures are stable without solvent inclusion. In the case of the 5-fold interpenetrated structure, this is due to close packing of ADTA molecules and this is the overall lowest energy packing mode of the molecule. For the 4-fold interpenetrated structure, the ability to maintain the structure after evacuation of solvent from the pores may relate to the particular stability of this structure on the energy landscape (Figure ).