Cs2LaCl5 crystallizes in the orthorhombic Pnma space group. Cs(1) is bonded in a 8-coordinate geometry to two equivalent Cl(1), two equivalent Cl(2), two equivalent Cl(3), and two equivalent Cl(4) atoms. La(1) is bonded to one Cl(1), one Cl(3), one Cl(4), and four equivalent Cl(2) atoms to form distorted edge-sharing LaCl7 pentagonal bipyramids. There are four inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 5-coordinate geometry to four equivalent Cs(1) and one La(1) atom. In the second Cl site, Cl(2) is bonded in a 4-coordinate geometry to two equivalent Cs(1) and two equivalent La(1) atoms. In the third Cl site, Cl(3) is bonded to four equivalent Cs(1) and one La(1) atom to form a mixture of distorted edge, corner, and face-sharing ClCs4La trigonal bipyramids. In the fourth Cl site, Cl(4) is bonded to four equivalent Cs(1) and one La(1) atom to form a mixture of distorted edge, corner, and face-sharing ClCs4La trigonal bipyramids.
Cs2LaCl5 crystallizes in the orthorhombic Pnma space group. Cs(1) is bonded in a 8-coordinate geometry to two equivalent Cl(1), two equivalent Cl(2), two equivalent Cl(3), and two equivalent Cl(4) atoms. There is one shorter (3.54 Å) and one longer (3.62 Å) Cs(1)-Cl(1) bond length. Both Cs(1)-Cl(2) bond lengths are 3.71 Å. There is one shorter (3.44 Å) and one longer (3.50 Å) Cs(1)-Cl(3) bond length. There is one shorter (3.44 Å) and one longer (3.47 Å) Cs(1)-Cl(4) bond length. La(1) is bonded to one Cl(1), one Cl(3), one Cl(4), and four equivalent Cl(2) atoms to form distorted edge-sharing LaCl7 pentagonal bipyramids. The La(1)-Cl(1) bond length is 2.80 Å. The La(1)-Cl(3) bond length is 2.82 Å. The La(1)-Cl(4) bond length is 2.82 Å. There are two shorter (2.91 Å) and two longer (2.95 Å) La(1)-Cl(2) bond lengths. There are four inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 5-coordinate geometry to four equivalent Cs(1) and one La(1) atom. In the second Cl site, Cl(2) is bonded in a 4-coordinate geometry to two equivalent Cs(1) and two equivalent La(1) atoms. In the third Cl site, Cl(3) is bonded to four equivalent Cs(1) and one La(1) atom to form a mixture of distorted edge, corner, and face-sharing ClCs4La trigonal bipyramids. In the fourth Cl site, Cl(4) is bonded to four equivalent Cs(1) and one La(1) atom to form a mixture of distorted edge, corner, and face-sharing ClCs4La trigonal bipyramids.