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Its sodium-ammonium salt is unusual among racemic mixtures in that during crystallization it can separate out into two kinds of crystals, each composed of one isomer, and whose macroscopic shapes are mirror images of each other. Louis Pasteur was thus able to separate the two enantiomers by picking apart the crystals.
In a modern-time re-enactment of the Pasteur experimentit was established that the preparation of crystals was not very reproducible, the crystals deformed but that the crystals were large enough to inspect with the naked eye (microscope not required).
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Racemic_acid". A list of authors is available in Wikipedia.|