3:3'-DICHLORO-4:4'-DIHYDROXYDIPHENYLMETHANE neighbour, whereas in the b direction the chlorine atom of one molecule lies near to the axis of the benzene rings of both its neighbours. It seems possible that some polarization effect associated with this arrangement may be responsible for the orientation of the (010) cleavage plane which cuts across the network of hydrogen bonds.
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Niekerk et al. (1953) studied this question.
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