LaC12H2O7Cl6 crystallizes in the triclinic P-1 space group. La(1) is bonded in a 6-coordinate geometry to one O(1), one O(3), one O(6), one O(7), and two equivalent O(5) atoms. The La(1)-O(1) bond length is 2.39 Å. The La(1)-O(3) bond length is 2.49 Å. The La(1)-O(6) bond length is 2.64 Å. The La(1)-O(7) bond length is 2.52 Å. There is one shorter (2.60 Å) and one longer (2.65 Å) La(1)-O(5) bond length. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.51 Å. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.24 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(4) atom. The C(2)-C(3) bond length is 1.37 Å. The C(2)-C(4) bond length is 1.41 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(4), and one Cl(1) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-Cl(1) bond length is 1.72 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(2), one C(3), and one Cl(2) atom. The C(4)-Cl(2) bond length is 1.71 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(3), and one O(4) atom. The C(5)-C(6) bond length is 1.52 Å. The C(5)-O(3) bond length is 1.26 Å. The C(5)-O(4) bond length is 1.23 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(5), one C(7), and one C(8) atom. The C(6)-C(7) bond length is 1.40 Å. The C(6)-C(8) bond length is 1.40 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(6), one C(8), and one Cl(3) atom. The C(7)-C(8) bond length is 1.39 Å. The C(7)-Cl(3) bond length is 1.73 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(6), one C(7), and one Cl(4) atom. The C(8)-Cl(4) bond length is 1.72 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(5), and one O(6) atom. The C(9)-C(10) bond length is 1.51 Å. The C(9)-O(5) bond length is 1.27 Å. The C(9)-O(6) bond length is 1.24 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(12), and one C(9) atom. The C(10)-C(11) bond length is 1.39 Å. The C(10)-C(12) bond length is 1.40 Å. In the eleventh C site, C(11) is bonded in a distorted trigonal planar geometry to one C(10), one C(12), and one Cl(5) atom. The C(11)-C(12) bond length is 1.39 Å. The C(11)-Cl(5) bond length is 1.72 Å. In the twelfth C site, C(12) is bonded in a distorted trigonal planar geometry to one C(10), one C(11), and one Cl(6) atom. The C(12)-Cl(6) bond length is 1.72 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(7) atom. The H(1)-O(7) bond length is 0.82 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(7) atom. The H(2)-O(7) bond length is 0.82 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one La(1) and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one La(1) and one C(5) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one C(5) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent La(1) and one C(9) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one La(1) and one C(9) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one La(1), one H(1), and one H(2) atom. There are six inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a single-bond geometry to one C(3) atom. In the second Cl site, Cl(2) is bonded in a single-bond geometry to one C(4) atom. In the third Cl site, Cl(3) is bonded in a single-bond geometry to one C(7) atom. In the fourth Cl site, Cl(4) is bonded in a single-bond geometry to one C(8) atom. In the fifth Cl site, Cl(5) is bonded in a single-bond geometry to one C(11) atom. In the sixth Cl site, Cl(6) is bonded in a single-bond geometry to one C(12) atom. Linkers: 3 [O]C(=O)c1c(Cl)c(Cl)c(C([O])=O)c(Cl)c1Cl. Metal clusters: 1 O.O.O=[C]O[La]1(O[C]=O)O[C]O[La](O[C]=O)(O[C]=O)O[C]O1. RCSR code: pcu. The MOF has largest included sphere 8.42 A, density 1.21 g/cm3, surface area 3470.07 m2/g, accessible volume 0.50 cm3/g