Ba2LaCl7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(7), two equivalent Cl(5), and two equivalent Cl(6) atoms. In the second Ba site, Ba(2) is bonded in a 9-coordinate geometry to one Cl(1), one Cl(4), one Cl(5), one Cl(6), one Cl(7), two equivalent Cl(2), and two equivalent Cl(3) atoms. La(1) is bonded in a distorted pentagonal bipyramidal geometry to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom. There are seven inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), and one La(1) atom. In the second Cl site, Cl(2) is bonded to one Ba(1), two equivalent Ba(2), and one La(1) atom to form a mixture of corner and edge-sharing ClBa3La tetrahedra. In the third Cl site, Cl(3) is bonded to one Ba(1), two equivalent Ba(2), and one La(1) atom to form a mixture of corner and edge-sharing ClBa3La tetrahedra. In the fourth Cl site, Cl(4) is bonded in a distorted T-shaped geometry to one Ba(1), one Ba(2), and one La(1) atom. In the fifth Cl site, Cl(5) is bonded to one Ba(2), two equivalent Ba(1), and one La(1) atom to form a mixture of corner and edge-sharing ClBa3La tetrahedra. In the sixth Cl site, Cl(6) is bonded to one Ba(2), two equivalent Ba(1), and one La(1) atom to form a mixture of corner and edge-sharing ClBa3La tetrahedra. In the seventh Cl site, Cl(7) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Ba(2), and one La(1) atom.
Ba2LaCl7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(7), two equivalent Cl(5), and two equivalent Cl(6) atoms. The Ba(1)-Cl(1) bond length is 3.36 Å. The Ba(1)-Cl(2) bond length is 3.32 Å. The Ba(1)-Cl(3) bond length is 3.25 Å. The Ba(1)-Cl(4) bond length is 3.15 Å. The Ba(1)-Cl(7) bond length is 3.28 Å. Both Ba(1)-Cl(5) bond lengths are 3.19 Å. There is one shorter (3.23 Å) and one longer (3.35 Å) Ba(1)-Cl(6) bond length. In the second Ba site, Ba(2) is bonded in a 9-coordinate geometry to one Cl(1), one Cl(4), one Cl(5), one Cl(6), one Cl(7), two equivalent Cl(2), and two equivalent Cl(3) atoms. The Ba(2)-Cl(1) bond length is 3.31 Å. The Ba(2)-Cl(4) bond length is 3.15 Å. The Ba(2)-Cl(5) bond length is 3.26 Å. The Ba(2)-Cl(6) bond length is 3.21 Å. The Ba(2)-Cl(7) bond length is 3.25 Å. There is one shorter (3.26 Å) and one longer (3.38 Å) Ba(2)-Cl(2) bond length. There is one shorter (3.26 Å) and one longer (3.28 Å) Ba(2)-Cl(3) bond length. La(1) is bonded in a distorted pentagonal bipyramidal geometry to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom. The La(1)-Cl(1) bond length is 2.82 Å. The La(1)-Cl(2) bond length is 2.85 Å. The La(1)-Cl(3) bond length is 2.91 Å. The La(1)-Cl(4) bond length is 2.87 Å. The La(1)-Cl(5) bond length is 2.87 Å. The La(1)-Cl(6) bond length is 2.85 Å. The La(1)-Cl(7) bond length is 2.80 Å. There are seven inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), and one La(1) atom. In the second Cl site, Cl(2) is bonded to one Ba(1), two equivalent Ba(2), and one La(1) atom to form a mixture of corner and edge-sharing ClBa3La tetrahedra. In the third Cl site, Cl(3) is bonded to one Ba(1), two equivalent Ba(2), and one La(1) atom to form a mixture of corner and edge-sharing ClBa3La tetrahedra. In the fourth Cl site, Cl(4) is bonded in a distorted T-shaped geometry to one Ba(1), one Ba(2), and one La(1) atom. In the fifth Cl site, Cl(5) is bonded to one Ba(2), two equivalent Ba(1), and one La(1) atom to form a mixture of corner and edge-sharing ClBa3La tetrahedra. In the sixth Cl site, Cl(6) is bonded to one Ba(2), two equivalent Ba(1), and one La(1) atom to form a mixture of corner and edge-sharing ClBa3La tetrahedra. In the seventh Cl site, Cl(7) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Ba(2), and one La(1) atom.