CsLaO3Cl4 crystallizes in the monoclinic P2_1/m space group. Cs(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent Cl(1), and four equivalent Cl(2) atoms. La(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), two equivalent Cl(2), and four equivalent Cl(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Cs(1) and one La(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one La(1) and two equivalent Cl(2) atoms. In the third O site, O(3) is bonded in a single-bond geometry to one La(1) and two equivalent Cl(2) atoms. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 3-coordinate geometry to one Cs(1) and two equivalent La(1) atoms. In the second Cl site, Cl(2) is bonded in a 5-coordinate geometry to two equivalent Cs(1), one La(1), one O(2), and one O(3) atom.
CsLaO3Cl4 crystallizes in the monoclinic P2_1/m space group. Cs(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent Cl(1), and four equivalent Cl(2) atoms. The Cs(1)-O(1) bond length is 3.31 Å. Both Cs(1)-Cl(1) bond lengths are 3.64 Å. There are two shorter (3.60 Å) and two longer (3.70 Å) Cs(1)-Cl(2) bond lengths. La(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), two equivalent Cl(2), and four equivalent Cl(1) atoms. The La(1)-O(1) bond length is 2.53 Å. The La(1)-O(2) bond length is 2.45 Å. The La(1)-O(3) bond length is 2.39 Å. Both La(1)-Cl(2) bond lengths are 2.92 Å. There are two shorter (2.94 Å) and two longer (2.96 Å) La(1)-Cl(1) bond lengths. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Cs(1) and one La(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one La(1) and two equivalent Cl(2) atoms. Both O(2)-Cl(2) bond lengths are 2.48 Å. In the third O site, O(3) is bonded in a single-bond geometry to one La(1) and two equivalent Cl(2) atoms. Both O(3)-Cl(2) bond lengths are 2.47 Å. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 3-coordinate geometry to one Cs(1) and two equivalent La(1) atoms. In the second Cl site, Cl(2) is bonded in a 5-coordinate geometry to two equivalent Cs(1), one La(1), one O(2), and one O(3) atom.