UCl3 crystallizes in the monoclinic Pm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 9-coordinate geometry to one Cl(1), one Cl(4), one Cl(5), two equivalent Cl(2), two equivalent Cl(3), and two equivalent Cl(6) atoms. In the second U site, U(2) is bonded in a 9-coordinate geometry to one Cl(2), one Cl(3), one Cl(6), two equivalent Cl(1), two equivalent Cl(4), and two equivalent Cl(5) atoms. There are six inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a trigonal non-coplanar geometry to one U(1) and two equivalent U(2) atoms. In the second Cl site, Cl(2) is bonded in a trigonal non-coplanar geometry to one U(2) and two equivalent U(1) atoms. In the third Cl site, Cl(3) is bonded in a trigonal non-coplanar geometry to one U(2) and two equivalent U(1) atoms. In the fourth Cl site, Cl(4) is bonded in a trigonal non-coplanar geometry to one U(1) and two equivalent U(2) atoms. In the fifth Cl site, Cl(5) is bonded in a trigonal non-coplanar geometry to one U(1) and two equivalent U(2) atoms. In the sixth Cl site, Cl(6) is bonded in a trigonal non-coplanar geometry to one U(2) and two equivalent U(1) atoms.
UCl3 crystallizes in the monoclinic Pm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 9-coordinate geometry to one Cl(1), one Cl(4), one Cl(5), two equivalent Cl(2), two equivalent Cl(3), and two equivalent Cl(6) atoms. The U(1)-Cl(1) bond length is 3.01 Å. The U(1)-Cl(4) bond length is 2.94 Å. The U(1)-Cl(5) bond length is 2.94 Å. Both U(1)-Cl(2) bond lengths are 2.94 Å. Both U(1)-Cl(3) bond lengths are 2.94 Å. Both U(1)-Cl(6) bond lengths are 2.89 Å. In the second U site, U(2) is bonded in a 9-coordinate geometry to one Cl(2), one Cl(3), one Cl(6), two equivalent Cl(1), two equivalent Cl(4), and two equivalent Cl(5) atoms. The U(2)-Cl(2) bond length is 2.98 Å. The U(2)-Cl(3) bond length is 2.92 Å. The U(2)-Cl(6) bond length is 2.98 Å. Both U(2)-Cl(1) bond lengths are 2.90 Å. Both U(2)-Cl(4) bond lengths are 2.92 Å. Both U(2)-Cl(5) bond lengths are 2.93 Å. There are six inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a trigonal non-coplanar geometry to one U(1) and two equivalent U(2) atoms. In the second Cl site, Cl(2) is bonded in a trigonal non-coplanar geometry to one U(2) and two equivalent U(1) atoms. In the third Cl site, Cl(3) is bonded in a trigonal non-coplanar geometry to one U(2) and two equivalent U(1) atoms. In the fourth Cl site, Cl(4) is bonded in a trigonal non-coplanar geometry to one U(1) and two equivalent U(2) atoms. In the fifth Cl site, Cl(5) is bonded in a trigonal non-coplanar geometry to one U(1) and two equivalent U(2) atoms. In the sixth Cl site, Cl(6) is bonded in a trigonal non-coplanar geometry to one U(2) and two equivalent U(1) atoms.