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Abstract 120 substances with one or more liquid crystalline phases have been studied in 180 binary systems by the combined examination of the relations of miscibility and the observation of the textures by means of a micro heating stage. The examinations enable us to give two systems of liquid crystalline phases. The system based on the observation of the textures corresponds with the system based on the relations of miscibility. All liquid crystalline phases investigated can be divided into four groups, one nematic, and three smectic; the latter being called A, B and C. Some facts point to structural differences between the three smectic groups.
Sackmann et al. (Thu,) studied this question.
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