The formation of gels in aqueous solutions of polar organic solvents by the use of a synthetic hectorite has been studied. The thickness of the electrical double layer decreases when the dielectric constant of the medium is reduced, allowing stronger edge-to-face interparticle bonding. This edge-to-face bonding causes a card house like structure of the clay particles within the solution. This can also be achieved by the addition of electrolyte. There was a maximum concentration for each solvent in which clear dispersions could be made, and this was increased with the molecular weight of the organic solvent. Addition of electrolyte and further increased amounts of organic solvent caused an increase in the yield value and the viscosity, but flocculation was occurred at high levels.