Measurement of concentration fields around dendritic growing crystals from solution: characterization of the growth conditions at the dendrite tip

The concentration fields around ammonium chloride dendrites growing from super-saturated solution were measured interferometrically in a two dimensional system. The relationship between tip velocity and super-saturation was determined both on the interface and remote from it. The results show a morphological transition and are compared to a model by Brener which relates such a transition to differing anisotropies of surface tension and kinetic effect.