Abstract
THE growth of zinc sulphide1 and magnesium sulphate2 crystals in spiral form has recently been reported. Spiral crystals of meconin (6 : 7-dimeth-oxy-phthalide) with melting point 101–101.5° C. (lit. 102.5°)) have been isolated from an aqueous propanolic solution which had been saturated with chloroform. Only six spirals, 2–3.3 mm. in length, appeared together with the regular needle form. An attempt to reproduce this spiral crystal form was unsuccessful. The photograph, taken by I. McGill, shows three crystals, the central one of which was 2 mm. long.
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References
Addamiano, A., Nature, 179, 493 (1957).
Shayer, M., Nature, 179, 1364 (1957).
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LOGAN, W. Spiral Crystals of Meconin. Nature 180, 1412 (1957). https://doi.org/10.1038/1801412a0
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DOI: https://doi.org/10.1038/1801412a0
