K2Pr2C8H2O17 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(10), one O(14), one O(15), one O(16), one O(2), one O(4), one O(6), and one O(8) atom. The K(1)-O(10) bond length is 3.10 Å. The K(1)-O(14) bond length is 2.88 Å. The K(1)-O(15) bond length is 2.73 Å. The K(1)-O(16) bond length is 2.90 Å. The K(1)-O(2) bond length is 2.88 Å. The K(1)-O(4) bond length is 2.75 Å. The K(1)-O(6) bond length is 3.20 Å. The K(1)-O(8) bond length is 2.86 Å. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(17), one O(3), one O(7), and two equivalent O(9) atoms. The K(2)-O(1) bond length is 2.65 Å. The K(2)-O(11) bond length is 2.92 Å. The K(2)-O(17) bond length is 2.62 Å. The K(2)-O(3) bond length is 2.65 Å. The K(2)-O(7) bond length is 2.87 Å. There is one shorter (2.74 Å) and one longer (3.00 Å) K(2)-O(9) bond length. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 9-coordinate geometry to one O(1), one O(12), one O(14), one O(2), one O(6), one O(7), one O(8), and two equivalent O(5) atoms. The Pr(1)-O(1) bond length is 2.54 Å. The Pr(1)-O(12) bond length is 2.49 Å. The Pr(1)-O(14) bond length is 2.55 Å. The Pr(1)-O(2) bond length is 2.53 Å. The Pr(1)-O(6) bond length is 2.52 Å. The Pr(1)-O(7) bond length is 2.51 Å. The Pr(1)-O(8) bond length is 2.51 Å. There is one shorter (2.63 Å) and one longer (2.64 Å) Pr(1)-O(5) bond length. In the second Pr site, Pr(2) is bonded in a 9-coordinate geometry to one O(10), one O(11), one O(15), one O(16), one O(3), one O(4), one O(9), and two equivalent O(13) atoms. The Pr(2)-O(10) bond length is 2.53 Å. The Pr(2)-O(11) bond length is 2.69 Å. The Pr(2)-O(15) bond length is 2.48 Å. The Pr(2)-O(16) bond length is 2.56 Å. The Pr(2)-O(3) bond length is 2.52 Å. The Pr(2)-O(4) bond length is 2.53 Å. The Pr(2)-O(9) bond length is 2.50 Å. There is one shorter (2.55 Å) and one longer (2.57 Å) Pr(2)-O(13) bond length. There are eight inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(4) atom. The C(1)-O(2) bond length is 1.26 Å. The C(1)-O(4) bond length is 1.27 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(3) atom. The C(2)-O(1) bond length is 1.26 Å. The C(2)-O(3) bond length is 1.27 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(5) atom. The C(3)-O(11) bond length is 1.25 Å. The C(3)-O(5) bond length is 1.29 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(12) and one O(13) atom. The C(4)-O(12) bond length is 1.25 Å. The C(4)-O(13) bond length is 1.28 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(14) and one O(6) atom. The C(5)-O(14) bond length is 1.28 Å. The C(5)-O(6) bond length is 1.26 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(7) and one O(9) atom. The C(6)-O(7) bond length is 1.26 Å. The C(6)-O(9) bond length is 1.27 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(8) atom. The C(7)-O(10) bond length is 1.26 Å. The C(7)-O(8) bond length is 1.27 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one O(15) and one O(16) atom. The C(8)-O(15) bond length is 1.27 Å. The C(8)-O(16) bond length is 1.26 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(17) atom. The H(1)-O(17) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(17) atom. The H(2)-O(17) bond length is 0.98 Å. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one K(2), one Pr(1), and one C(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one Pr(1), and one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(2), one Pr(2), and one C(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), one Pr(2), and one C(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Pr(1) and one C(3) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one K(1), one Pr(1), and one C(5) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one K(2), one Pr(1), and one C(6) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one K(1), one Pr(1), and one C(7) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to two equivalent K(2), one Pr(2), and one C(6) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one K(1), one Pr(2), and one C(7) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to one K(2), one Pr(2), and one C(3) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one Pr(1) and one C(4) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to two equivalent Pr(2) and one C(4) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one K(1), one Pr(1), and one C(5) atom. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one K(1), one Pr(2), and one C(8) atom. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one K(1), one Pr(2), and one C(8) atom. In the seventeenth O site, O(17) is bonded in a distorted water-like geometry to one K(2), one H(1), and one H(2) atom. Linkers: 16 [O]C(=O)C([O])=O. Metal clusters: 8 [K] ,8 [Pr]. The MOF has largest included sphere 1.55 A, density 2.96 g/cm3, surface area 1053.80 m2/g, accessible volume 0.01 cm3/g