Growth of calcium phosphate crystals in Silica gel

The results of a study of the crystal growth of calcium phosphates in silica gel employing double diffusion system with CaCl₂ and KH₂PO₄ aqueous solutions are reported. Liesegang rings, spherical crystalline agglomerates and brushite dendrites are formed near the CaCl₂ solution. It was found that the agglomerates consist of octacalcium phosphate and hydroxyapatite crystals with the predominance the former.