SrLaCl5 crystallizes in the monoclinic P2_1/m space group. Sr(1) is bonded to one Cl(1), one Cl(4), two equivalent Cl(5), and three equivalent Cl(3) atoms to form distorted edge-sharing SrCl7 pentagonal bipyramids. La(1) is bonded in a 8-coordinate geometry to one Cl(5), two equivalent Cl(1), two equivalent Cl(4), and three equivalent Cl(2) atoms. There are five inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted T-shaped geometry to one Sr(1) and two equivalent La(1) atoms. In the second Cl site, Cl(2) is bonded in a trigonal non-coplanar geometry to three equivalent La(1) atoms. In the third Cl site, Cl(3) is bonded in a trigonal non-coplanar geometry to three equivalent Sr(1) atoms. In the fourth Cl site, Cl(4) is bonded in a distorted T-shaped geometry to one Sr(1) and two equivalent La(1) atoms. In the fifth Cl site, Cl(5) is bonded in a distorted T-shaped geometry to two equivalent Sr(1) and one La(1) atom.
SrLaCl5 crystallizes in the monoclinic P2_1/m space group. Sr(1) is bonded to one Cl(1), one Cl(4), two equivalent Cl(5), and three equivalent Cl(3) atoms to form distorted edge-sharing SrCl7 pentagonal bipyramids. The Sr(1)-Cl(1) bond length is 3.15 Å. The Sr(1)-Cl(4) bond length is 3.27 Å. Both Sr(1)-Cl(5) bond lengths are 2.93 Å. There are two shorter (2.86 Å) and one longer (2.94 Å) Sr(1)-Cl(3) bond length. La(1) is bonded in a 8-coordinate geometry to one Cl(5), two equivalent Cl(1), two equivalent Cl(4), and three equivalent Cl(2) atoms. The La(1)-Cl(5) bond length is 2.93 Å. Both La(1)-Cl(1) bond lengths are 2.93 Å. Both La(1)-Cl(4) bond lengths are 2.98 Å. There are two shorter (2.90 Å) and one longer (3.00 Å) La(1)-Cl(2) bond length. There are five inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted T-shaped geometry to one Sr(1) and two equivalent La(1) atoms. In the second Cl site, Cl(2) is bonded in a trigonal non-coplanar geometry to three equivalent La(1) atoms. In the third Cl site, Cl(3) is bonded in a trigonal non-coplanar geometry to three equivalent Sr(1) atoms. In the fourth Cl site, Cl(4) is bonded in a distorted T-shaped geometry to one Sr(1) and two equivalent La(1) atoms. In the fifth Cl site, Cl(5) is bonded in a distorted T-shaped geometry to two equivalent Sr(1) and one La(1) atom.