Until Uchida’s image was revealed, perovskites had been considered to have a purely tetragonal crystal structure, but Uchida’s discovery showed that they can also have a cubic structure of a ...

resulting in a hydrated potassium calcium sodium silicate structure. Geologically, apophyllite is classified as a tetragonal ...

tetragonal, orthorhombic, hexagonal, trigonal, monoclinic, and triclinic—describe the spatial arrangement and symmetry of atoms within a crystal structure. Each system corresponds to a unique ...