<Ul> <Li> Once single perfect crystals have been obtained, it is recommended that the crystals are kept in a sealed vessel with some of the liquid of crystallisation to prevent the crystal from' drying out' . Single perfect crystals may contain solvent of crystallisation in the crystal lattice . Loss of this internal solvent from the crystals can result in the crystal lattice breaking down, and the crystals turning to powder . </Li> </Ul> <Li> Once single perfect crystals have been obtained, it is recommended that the crystals are kept in a sealed vessel with some of the liquid of crystallisation to prevent the crystal from' drying out' . Single perfect crystals may contain solvent of crystallisation in the crystal lattice . Loss of this internal solvent from the crystals can result in the crystal lattice breaking down, and the crystals turning to powder . </Li> <P> For ice, recrystallization refers to the growth of larger crystals at the expense of smaller ones . Some biological antifreeze proteins have been shown to inhibit this process, and the effect may be relevant in freezing - tolerant organisms . </P>

When do you apply hot filtration during recrystallization