Abstract
An experiment performed during the Apollo-Soyuz flight investigated a novel process for growing single crystals from solutions. In zero gravity, reactant solutions were allowed to diffuse slowly toward each other through a region of pure solvent in which they underwent a chemical reaction to form crystals of an insoluble material. The process is analogous to the growth of crystals in gels in normal gravity. The experiment was successful and yielded crystals of about the expected size, number, and quality. The results indicate thai with further refinement the process should yield large, high-quality crystals of a variety of materials.
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