Crystallographic measurements of abietic acid

Abstract

This specimen of abiethic acid with a melting point of +143°C., was obtained by O. O. Koshelev in the laboratory of Prof. Chugaev from a solution in ethyl alcohol in the form of colorless transparent crystals. The crystals belong to the orthorhombic system of the gynohexagonal type and have a lamellar appearance, with the most prominently developed face (0101) and are almost always elongated in one of two directions: either along the [1000] axis or along the [0121] axis. On all observed crystals, the (0101) faces were strongly and completely irregularly curved. See the figure and measurement results in the article.

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