K2PuO4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. K(1) is bonded in a 9-coordinate geometry to four equivalent O(2) and five equivalent O(1) atoms. Pu(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing PuO6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent O sites. In the first O site, O(2) is bonded to four equivalent K(1) and two equivalent Pu(1) atoms to form a mixture of distorted face, corner, and edge-sharing OK4Pu2 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(1) is bonded in a 6-coordinate geometry to five equivalent K(1) and one Pu(1) atom.
K2PuO4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. K(1) is bonded in a 9-coordinate geometry to four equivalent O(2) and five equivalent O(1) atoms. All K(1)-O(2) bond lengths are 2.90 Å. There is one shorter (2.70 Å) and four longer (3.03 Å) K(1)-O(1) bond lengths. Pu(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing PuO6 octahedra. The corner-sharing octahedra are not tilted. Both Pu(1)-O(1) bond lengths are 1.90 Å. All Pu(1)-O(2) bond lengths are 2.15 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded to four equivalent K(1) and two equivalent Pu(1) atoms to form a mixture of distorted face, corner, and edge-sharing OK4Pu2 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(1) is bonded in a 6-coordinate geometry to five equivalent K(1) and one Pu(1) atom.