We report the observation of the coexistence of oscillatory-type and ordinary steady-type dendrites growing simultaneously from a seed, respectively, in the [111] and [100] directions in an undercooled succinonitrile-acetone solution. It is suggested that a kinetic effect may be responsible for the mechanism of oscillatory growth. The present observation may help in understanding the mechanism for oscillatory growth when the direction of growth is not along the principal axis of anisotropy of the surface tension.

• Received 28 December 1990

DOI:https://doi.org/10.1103/PhysRevA.43.5537