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Abstract Crystals of 1-nitronaphthalene were grown by evaporation of a methanol solution. The structure P 2 1 / c , a = 13.2780(13) Å, b = 3.8131(3)° Å, c = 31.851(3) Å, β = 91.173(8), V = 1,612.3 Å 3 was solved from a crystal twinned by twofold rotation about 100. Twinning is explained by the polytype character: layers with (idealized) p 2 1 11 symmetry can connect via either 1‾ or 2 1 operations, leading to geometrically distinct pairs of layers. In the twin individuals, the two kinds of contacts alternate, at the composition plane two subsequent contacts of the same type are realized.
Schöbinger et al. (Tue,) studied this question.
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