UF4 crystallizes in the monoclinic C2/c space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to one F(1), one F(2), one F(3), one F(4), one F(5), one F(6), and two equivalent F(7) atoms. In the second U site, U(2) is bonded in a 8-coordinate geometry to two equivalent F(1), two equivalent F(2), two equivalent F(5), and two equivalent F(6) atoms. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one U(1) and one U(2) atom. In the second F site, F(2) is bonded in a linear geometry to one U(1) and one U(2) atom. In the third F site, F(3) is bonded in a linear geometry to two equivalent U(1) atoms. In the fourth F site, F(4) is bonded in a linear geometry to two equivalent U(1) atoms. In the fifth F site, F(5) is bonded in a bent 150 degrees geometry to one U(1) and one U(2) atom. In the sixth F site, F(6) is bonded in a linear geometry to one U(1) and one U(2) atom. In the seventh F site, F(7) is bonded in a bent 150 degrees geometry to two equivalent U(1) atoms.
UF4 crystallizes in the monoclinic C2/c space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to one F(1), one F(2), one F(3), one F(4), one F(5), one F(6), and two equivalent F(7) atoms. The U(1)-F(1) bond length is 2.29 Å. The U(1)-F(2) bond length is 2.31 Å. The U(1)-F(3) bond length is 2.25 Å. The U(1)-F(4) bond length is 2.31 Å. The U(1)-F(5) bond length is 2.24 Å. The U(1)-F(6) bond length is 2.30 Å. There is one shorter (2.21 Å) and one longer (2.33 Å) U(1)-F(7) bond length. In the second U site, U(2) is bonded in a 8-coordinate geometry to two equivalent F(1), two equivalent F(2), two equivalent F(5), and two equivalent F(6) atoms. Both U(2)-F(1) bond lengths are 2.28 Å. Both U(2)-F(2) bond lengths are 2.23 Å. Both U(2)-F(5) bond lengths are 2.38 Å. Both U(2)-F(6) bond lengths are 2.27 Å. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one U(1) and one U(2) atom. In the second F site, F(2) is bonded in a linear geometry to one U(1) and one U(2) atom. In the third F site, F(3) is bonded in a linear geometry to two equivalent U(1) atoms. In the fourth F site, F(4) is bonded in a linear geometry to two equivalent U(1) atoms. In the fifth F site, F(5) is bonded in a bent 150 degrees geometry to one U(1) and one U(2) atom. In the sixth F site, F(6) is bonded in a linear geometry to one U(1) and one U(2) atom. In the seventh F site, F(7) is bonded in a bent 150 degrees geometry to two equivalent U(1) atoms.