SEARCH Articles Figures Tables A commonly used conceptual model for the formation of gas hydrate from water and gas. Since gas is only poorly soluble in water, hydrate forms on surfaces as well as in the bulk. Standard nucleation theory suggests that water-gas clusters form sub-critical nuclei clusters of the thermodynamic product which at a certain minimum size become large enough to survive. Once crystals form they will grow and or agglomerate. [Publishers Imprint]