AcCuO2F crystallizes in the tetragonal I4/mcm space group. Ac(1) is bonded to eight equivalent O(1) and four equivalent F(1) atoms to form distorted AcO8F4 cuboctahedra that share corners with twelve equivalent Ac(1)O8F4 cuboctahedra, faces with six equivalent Ac(1)O8F4 cuboctahedra, and faces with eight equivalent Cu(1)O4F2 octahedra. Cu(1) is bonded to four equivalent O(1) and two equivalent F(1) atoms to form CuO4F2 octahedra that share corners with six equivalent Cu(1)O4F2 octahedra and faces with eight equivalent Ac(1)O8F4 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-21°. O(1) is bonded in a 4-coordinate geometry to four equivalent Ac(1) and two equivalent Cu(1) atoms. F(1) is bonded to four equivalent Ac(1) and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing FAc4Cu2 octahedra. The corner-sharing octahedra are not tilted.
AcCuO2F crystallizes in the tetragonal I4/mcm space group. Ac(1) is bonded to eight equivalent O(1) and four equivalent F(1) atoms to form distorted AcO8F4 cuboctahedra that share corners with twelve equivalent Ac(1)O8F4 cuboctahedra, faces with six equivalent Ac(1)O8F4 cuboctahedra, and faces with eight equivalent Cu(1)O4F2 octahedra. There are four shorter (2.62 Å) and four longer (3.12 Å) Ac(1)-O(1) bond lengths. All Ac(1)-F(1) bond lengths are 2.82 Å. Cu(1) is bonded to four equivalent O(1) and two equivalent F(1) atoms to form CuO4F2 octahedra that share corners with six equivalent Cu(1)O4F2 octahedra and faces with eight equivalent Ac(1)O8F4 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-21°. All Cu(1)-O(1) bond lengths are 2.03 Å. Both Cu(1)-F(1) bond lengths are 2.04 Å. O(1) is bonded in a 4-coordinate geometry to four equivalent Ac(1) and two equivalent Cu(1) atoms. F(1) is bonded to four equivalent Ac(1) and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing FAc4Cu2 octahedra. The corner-sharing octahedra are not tilted.