K2UF6 crystallizes in the hexagonal P-62m space group. K(1) is bonded in a 9-coordinate geometry to three equivalent F(1) and six equivalent F(2) atoms. U(1) is bonded in a 9-coordinate geometry to three equivalent F(2) and six equivalent F(1) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded to two equivalent K(1) and two equivalent U(1) atoms to form a mixture of corner and edge-sharing FK2U2 tetrahedra. In the second F site, F(2) is bonded in a 5-coordinate geometry to four equivalent K(1) and one U(1) atom.
K2UF6 crystallizes in the hexagonal P-62m space group. K(1) is bonded in a 9-coordinate geometry to three equivalent F(1) and six equivalent F(2) atoms. All K(1)-F(1) bond lengths are 2.65 Å. All K(1)-F(2) bond lengths are 2.89 Å. U(1) is bonded in a 9-coordinate geometry to three equivalent F(2) and six equivalent F(1) atoms. All U(1)-F(2) bond lengths are 2.27 Å. All U(1)-F(1) bond lengths are 2.40 Å. There are two inequivalent F sites. In the first F site, F(1) is bonded to two equivalent K(1) and two equivalent U(1) atoms to form a mixture of corner and edge-sharing FK2U2 tetrahedra. In the second F site, F(2) is bonded in a 5-coordinate geometry to four equivalent K(1) and one U(1) atom.