EuCl3 crystallizes in the monoclinic Pm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 9-coordinate geometry to one Cl(1), one Cl(2), one Cl(6), two equivalent Cl(3), two equivalent Cl(4), and two equivalent Cl(5) atoms. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one Cl(3), one Cl(4), one Cl(5), two equivalent Cl(1), two equivalent Cl(2), and two equivalent Cl(6) atoms. There are six inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a trigonal non-coplanar geometry to one Eu(1) and two equivalent Eu(2) atoms. In the second Cl site, Cl(2) is bonded in a trigonal non-coplanar geometry to one Eu(1) and two equivalent Eu(2) atoms. In the third Cl site, Cl(3) is bonded in a trigonal non-coplanar geometry to one Eu(2) and two equivalent Eu(1) atoms. In the fourth Cl site, Cl(4) is bonded in a trigonal non-coplanar geometry to one Eu(2) and two equivalent Eu(1) atoms. In the fifth Cl site, Cl(5) is bonded in a trigonal non-coplanar geometry to one Eu(2) and two equivalent Eu(1) atoms. In the sixth Cl site, Cl(6) is bonded in a trigonal non-coplanar geometry to one Eu(1) and two equivalent Eu(2) atoms.
EuCl3 crystallizes in the monoclinic Pm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 9-coordinate geometry to one Cl(1), one Cl(2), one Cl(6), two equivalent Cl(3), two equivalent Cl(4), and two equivalent Cl(5) atoms. The Eu(1)-Cl(1) bond length is 2.90 Å. The Eu(1)-Cl(2) bond length is 2.98 Å. The Eu(1)-Cl(6) bond length is 2.94 Å. Both Eu(1)-Cl(3) bond lengths are 2.90 Å. Both Eu(1)-Cl(4) bond lengths are 2.88 Å. Both Eu(1)-Cl(5) bond lengths are 2.89 Å. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one Cl(3), one Cl(4), one Cl(5), two equivalent Cl(1), two equivalent Cl(2), and two equivalent Cl(6) atoms. The Eu(2)-Cl(3) bond length is 2.95 Å. The Eu(2)-Cl(4) bond length is 2.96 Å. The Eu(2)-Cl(5) bond length is 2.91 Å. Both Eu(2)-Cl(1) bond lengths are 2.92 Å. Both Eu(2)-Cl(2) bond lengths are 2.88 Å. Both Eu(2)-Cl(6) bond lengths are 2.87 Å. There are six inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a trigonal non-coplanar geometry to one Eu(1) and two equivalent Eu(2) atoms. In the second Cl site, Cl(2) is bonded in a trigonal non-coplanar geometry to one Eu(1) and two equivalent Eu(2) atoms. In the third Cl site, Cl(3) is bonded in a trigonal non-coplanar geometry to one Eu(2) and two equivalent Eu(1) atoms. In the fourth Cl site, Cl(4) is bonded in a trigonal non-coplanar geometry to one Eu(2) and two equivalent Eu(1) atoms. In the fifth Cl site, Cl(5) is bonded in a trigonal non-coplanar geometry to one Eu(2) and two equivalent Eu(1) atoms. In the sixth Cl site, Cl(6) is bonded in a trigonal non-coplanar geometry to one Eu(1) and two equivalent Eu(2) atoms.