Materials Data on K4Al2O by Materials Project
K4Al2O crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. K is bonded in a distorted single-bond geometry to three equivalent Al and one O atom. All K–Al bond lengths are 3.27 Å. The K–O bond length is 2.86 Å. Al is bonded to six equivalent K atoms to form distorted AlK6 octahedra that share edges with six equivalent AlK6 octahedra and faces with two equivalent OK4 tetrahedra. O is bonded to four equivalent K atoms to form OK4 tetrahedra that share faces with four equivalent AlK6 octahedra.
36 MATERIALS SCIENCE↗