Crystal unclear

Conventional wisdom cannot explain the intricacies of that apparently mundane material, calcium carbonate. Researchers at the Max Planck Institute of Colloids and Interfaces, in Golm near Potsdam, Germany, investigated the crystallization of calcium carbonate. They found that it forms stable nanoclusters, of a few dozen calcium and carbonate ions, in water even at low concentration, which is not how things are supposed to happen, according to the crystallization theory.