Ni2C20N4H12O9(CH)4 crystallizes in the tetragonal P4/ncc space group. The structure consists of thirty-two 02329_fluka molecules inside a Ni2C20N4H12O9 framework. In the Ni2C20N4H12O9 framework, Ni(1) is bonded to one N(1), one N(2), one O(1), one O(3), one O(4), and one O(5) atom to form corner-sharing NiN2O4 octahedra. The corner-sharing octahedral tilt angles are 68°. The Ni(1)-N(1) bond length is 2.10 Å. The Ni(1)-N(2) bond length is 2.07 Å. The Ni(1)-O(1) bond length is 2.08 Å. The Ni(1)-O(3) bond length is 2.09 Å. The Ni(1)-O(4) bond length is 2.02 Å. The Ni(1)-O(5) bond length is 2.12 Å. There are ten 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 1.52 Å. The C(1)-O(1) bond length is 1.22 Å. The C(1)-O(2) bond length is 1.27 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(6) atom. The C(2)-C(3) bond length is 1.38 Å. The C(2)-C(6) bond length is 1.37 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2) and one H(1) atom. The C(3)-H(1) bond length is 0.95 Å. In the fourth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(3) atom. The C(5)-N(1) bond length is 1.32 Å. The C(5)-H(3) bond length is 0.95 Å. In the fifth C site, C(11) is bonded in a distorted bent 120 degrees geometry to one N(2) and one H(7) atom. The C(11)-N(2) bond length is 1.34 Å. The C(11)-H(7) bond length is 0.95 Å. In the sixth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(8), one N(2), and one H(8) atom. The C(12)-C(8) bond length is 1.38 Å. The C(12)-N(2) bond length is 1.33 Å. The C(12)-H(8) bond length is 0.95 Å. In the seventh C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(2), one N(1), and one H(4) atom. The C(6)-N(1) bond length is 1.34 Å. The C(6)-H(4) bond length is 0.95 Å. In the eighth C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(3), and one O(4) atom. The C(7)-C(8) bond length is 1.51 Å. The C(7)-O(3) bond length is 1.26 Å. The C(7)-O(4) bond length is 1.26 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(8) and one H(5) atom. The C(9)-C(8) bond length is 1.38 Å. The C(9)-H(5) bond length is 0.95 Å. In the tenth C site, C(8) is bonded in a trigonal planar geometry to one C(12), one C(7), and one C(9) atom. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Ni(1), one C(5), and one C(6) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Ni(1), one C(11), and one C(12) atom. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(9) atom. In the fifth H site, H(7) is bonded in a single-bond geometry to one C(11) atom. In the sixth H site, H(8) is bonded in a single-bond geometry to one C(12) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded in a bent 120 degrees geometry to two equivalent Ni(1) atoms. In the second O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Ni(1) and one C(1) atom. In the third O site, O(2) is bonded in a single-bond geometry to one C(1) atom. In the fourth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Ni(1) and one C(7) atom. In the fifth O site, O(4) is bonded in a bent 120 degrees geometry to one Ni(1) and one C(7) atom. Linkers: 32 [O]C(=O)c1cccnc1. Metal clusters: 8 O=[C]O[Ni@]12O[C]O[Ni@](O[C]=O)(O[C]O1)O2. The MOF has largest included sphere 4.99 A, density 1.46 g/cm3, surface area 3997.24 m2/g, accessible volume 0.31 cm3/g