2011 年 32 巻 1 号 p. 39-44
Common principles which govern the incorporation of impurity molecules into the lattice are discussed after a short overview on representative simple organic crystals, their cohesive energies and crystal structures. Representative means for realizing high purity organic crystals such as chromatography, recrystallization form solution, vacuum sublimation and zone-refining are discussed with comments on their advantages and limitations.