Morphological Changes in Dendritic Crystal Growth of Ammonium Chloride on Agar Plates

Abstract

Dendritic crystals of ammonium chloride (NH₄Cl) have been grown two-dimensionally on the surface of agar medium. Varying initial concentrations of agar and ammonium chloride in the agar medium, a rich variety of morphologies of dendrites, such as DLA-like structure and dense-branching morphology, were found to be observed. They were classified into five main types according to their pattern characteristics. We report the morphological phase diagram and typical patterns obtained in the present experiments.