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A homochiral crystal is composed of a single enantiomer, whereas a heterochiral crystal contains both opposite enantiomers in the crystal lattice. A racemic conglomerate is an equimolar physical mixture of homochiral crystals of both enantiomers, while a racemic compound and a pseudoracemate are heterochiral crystals. In a racemic compound, the two opposite enantiomers are paired up in the unit cell of the crystal lattice, whereas in a pseudoracemate the opposite enantiomers are arranged more or less randomly as a solid solution.
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