X-ray_crystals_-_slow_gas_diffusion_2_solvent:

• Solvent added (clear) to compound (orange) in first vessel to give compound solution (orange)
• First vessel is placed in a second vessel containing second solvent (blue). The second vessel is sealed, the first vessel is also sealed, although a small hole in the first vessel is present. This hole allows volatile solvent vapour (blue) to slowly evaporate from second vessel and condensate (that is infuse) into the first vessel, to give a mixed solvent system (green)
• Overtime this gives crystals (orange) and a non-saturated mixed solvent system (green-blue).