KScH6(CO2)6 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in an octahedral geometry to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms. Both K(1)-O(2) bond lengths are 2.68 Å. Both K(1)-O(4) bond lengths are 2.67 Å. Both K(1)-O(6) bond lengths are 2.70 Å. Sc(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms. Both Sc(1)-O(1) bond lengths are 2.08 Å. Both Sc(1)-O(3) bond lengths are 2.09 Å. Both Sc(1)-O(5) bond lengths are 2.09 Å. There are three inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one H(1), one O(1), and one O(2) atom. The C(1)-H(1) bond length is 0.93 Å. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.22 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one H(2), one O(3), and one O(4) atom. The C(2)-H(2) bond length is 0.93 Å. The C(2)-O(3) bond length is 1.27 Å. The C(2)-O(4) bond length is 1.22 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one H(3), one O(5), and one O(6) atom. The C(3)-H(3) bond length is 0.93 Å. The C(3)-O(5) bond length is 1.27 Å. The C(3)-O(6) bond length is 1.21 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. There are six inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one Sc(1) and one C(3) atom. In the second O site, O(6) is bonded in a bent 120 degrees geometry to one K(1) and one C(3) atom. In the third O site, O(1) is bonded in a bent 150 degrees geometry to one Sc(1) and one C(1) atom. In the fourth O site, O(2) is bonded in a bent 120 degrees geometry to one K(1) and one C(1) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one Sc(1) and one C(2) atom. In the sixth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one K(1) and one C(2) atom. Linkers: 12 [O]C=O. Metal clusters: 2 [K] ,2 [Sc]. The MOF has largest included sphere 4.93 A, density 1.01 g/cm3, surface area 4570.64 m2/g, accessible volume 0.53 cm3/g