Ammonium carbonate gas diffusion crystallization in a continuous organic medium leads to dendritic calcium carbonate

The crystallization of calcium carbonate in a continuous organic medium using the classic ammonium carbonate gas diffusion system was recorded with an optical microscope.Surprisingly, dendritic structures were obtained consistently when the product gas mixture combined with calcium chloride already dissolved in the organic medium.Characterization studies revealed these crystals to be composite mixtures of calcium carbonate and ammonium chloride. ObjectiveTo study calcium carbonate crystallization in a continuous organic medium containing dissolved calcium chloride while using ammonium carbonate gas diffusion method to feed the reaction precursors.