Crystalline solids are generally thought to adsorb water because
of minimal pathways for water to penetrate the particle
bulk. However, it is possible that some of the critical distinctions
in crystalline materials arise from defects or imperfect
crystallinity, which leads to water absorption in addition to adsorption.
In this context, the theoretical analysis should not be
limited to or assume only adsorption. It is in fact unnecessary
and certainly undesirable to make such limiting assumptions
in the theoretical analysis