Zaccagnaite is a mineral, with a formula Zn4Al2CO3(OH)12·3H2O. It occurs as white hexagonal crystals associated with calcite in cavites in Carrara marble of the Italian Alps and is thought to have formed by hydrothermal alteration of sphalerite in an aluminium rich environment. It is named after Domenico Zaccagna (1851–1940), an Italian mineral collector. See also List of minerals List of minerals named after people References Webmineral data Mindat.org Zinc minerals Aluminium minerals Carbonate minerals Hexagonal minerals Minerals in space group 194