BaLaCl5 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded to one Cl(1), one Cl(2), one Cl(3), two equivalent Cl(4), and two equivalent Cl(5) atoms to form distorted BaCl7 pentagonal bipyramids that share corners with four equivalent La(1)Cl6 octahedra, edges with two equivalent La(1)Cl6 octahedra, and edges with two equivalent Ba(1)Cl7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 15-47°. La(1) is bonded to one Cl(1), one Cl(3), one Cl(4), one Cl(5), and two equivalent Cl(2) atoms to form LaCl6 octahedra that share corners with two equivalent La(1)Cl6 octahedra, corners with four equivalent Ba(1)Cl7 pentagonal bipyramids, and edges with two equivalent Ba(1)Cl7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 36°. There are five inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a bent 150 degrees geometry to one Ba(1) and one La(1) atom. In the second Cl site, Cl(2) is bonded in a 3-coordinate geometry to one Ba(1) and two equivalent La(1) atoms. In the third Cl site, Cl(3) is bonded in a linear geometry to one Ba(1) and one La(1) atom. In the fourth Cl site, Cl(4) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1) and one La(1) atom. In the fifth Cl site, Cl(5) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ba(1) and one La(1) atom.
BaLaCl5 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded to one Cl(1), one Cl(2), one Cl(3), two equivalent Cl(4), and two equivalent Cl(5) atoms to form distorted BaCl7 pentagonal bipyramids that share corners with four equivalent La(1)Cl6 octahedra, edges with two equivalent La(1)Cl6 octahedra, and edges with two equivalent Ba(1)Cl7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 15-47°. The Ba(1)-Cl(1) bond length is 3.04 Å. The Ba(1)-Cl(2) bond length is 3.34 Å. The Ba(1)-Cl(3) bond length is 3.04 Å. There is one shorter (3.21 Å) and one longer (3.31 Å) Ba(1)-Cl(4) bond length. There is one shorter (3.21 Å) and one longer (3.31 Å) Ba(1)-Cl(5) bond length. La(1) is bonded to one Cl(1), one Cl(3), one Cl(4), one Cl(5), and two equivalent Cl(2) atoms to form LaCl6 octahedra that share corners with two equivalent La(1)Cl6 octahedra, corners with four equivalent Ba(1)Cl7 pentagonal bipyramids, and edges with two equivalent Ba(1)Cl7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 36°. The La(1)-Cl(1) bond length is 2.72 Å. The La(1)-Cl(3) bond length is 2.72 Å. The La(1)-Cl(4) bond length is 2.83 Å. The La(1)-Cl(5) bond length is 2.85 Å. Both La(1)-Cl(2) bond lengths are 2.82 Å. There are five inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a bent 150 degrees geometry to one Ba(1) and one La(1) atom. In the second Cl site, Cl(2) is bonded in a 3-coordinate geometry to one Ba(1) and two equivalent La(1) atoms. In the third Cl site, Cl(3) is bonded in a linear geometry to one Ba(1) and one La(1) atom. In the fourth Cl site, Cl(4) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1) and one La(1) atom. In the fifth Cl site, Cl(5) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ba(1) and one La(1) atom.