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short communications
Three different forms of flat lead dendrites, grown by electrolysis, were investigated by X-ray diffraction techniques. All dendrites were shown to have a bicrystalline nature, with a common (111) plane parallel to the plane of the dendrites. The structures of the dendrites differed either in the angle through which rotation round the [111] axis would bring one component of the bicrystal to coincidence with the other, or in the position of the additional axes of symmetry of the bicrystals with respect to the direction of growth of the dendrites, or in both.