Letter | Published:

Spiral Crystals of Meconin

Nature volume 180, page 1412 (21 December 1957) | Download Citation



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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  1. 1.

    , Nature, 179, 493 (1957).

  2. 2.

    , Nature, 179, 1364 (1957).

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  1. Chemistry Department, The Royal College of Science and Technology, Glasgow, C.1.

    • W. R. LOGAN


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