K crystallizes in the orthorhombic Cmmm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded to eight equivalent K(2) atoms to form distorted edge-sharing KK8 hexagonal bipyramids. In the second K site, K(2) is bonded in a distorted hexagonal planar geometry to two equivalent K(1) and four equivalent K(2) atoms.
K crystallizes in the orthorhombic Cmmm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded to eight equivalent K(2) atoms to form distorted edge-sharing KK8 hexagonal bipyramids. All K(1)-K(2) bond lengths are 4.51 Å. In the second K site, K(2) is bonded in a distorted hexagonal planar geometry to two equivalent K(1) and four equivalent K(2) atoms. There are a spread of K(2)-K(2) bond distances ranging from 4.28-4.46 Å.