UF3 is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. U(1) is bonded to four equivalent F(2) and eight equivalent F(1) atoms to form a mixture of face, corner, and edge-sharing UF12 cuboctahedra. There are two inequivalent F sites. In the first F site, F(1) is bonded to four equivalent U(1) atoms to form a mixture of distorted corner and edge-sharing FU4 tetrahedra. In the second F site, F(2) is bonded in a square co-planar geometry to four equivalent U(1) atoms.
UF3 is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. U(1) is bonded to four equivalent F(2) and eight equivalent F(1) atoms to form a mixture of face, corner, and edge-sharing UF12 cuboctahedra. All U(1)-F(2) bond lengths are 2.63 Å. All U(1)-F(1) bond lengths are 2.55 Å. There are two inequivalent F sites. In the first F site, F(1) is bonded to four equivalent U(1) atoms to form a mixture of distorted corner and edge-sharing FU4 tetrahedra. In the second F site, F(2) is bonded in a square co-planar geometry to four equivalent U(1) atoms.