ZnC12NH3O4 crystallizes in the trigonal R-3 space group. Zn(1) is bonded in a distorted square co-planar geometry to two equivalent O(1,3) and two equivalent O(2,4) atoms. Both Zn(1)-O(1,3) bond lengths are 2.03 Å. Both Zn(1)-O(2,4) bond lengths are 2.02 Å. There are nine inequivalent C sites. In the first C site, C(12) is bonded in a distorted single-bond geometry to one C(11), one C(4), one C(5), one C(9), and one N(1) atom. The C(12)-C(11) bond length is 1.46 Å. The C(12)-C(4) bond length is 1.32 Å. The C(12)-C(5) bond length is 1.29 Å. The C(12)-C(9) bond length is 1.32 Å. The C(12)-N(1) bond length is 1.29 Å. In the second C site, C(10) is bonded in a distorted single-bond geometry to two equivalent C(2,7) and one H(3) atom. Both C(10)-C(2,7) bond lengths are 1.39 Å. The C(10)-H(3) bond length is 0.93 Å. In the third C site, C(1,6) is bonded in a bent 120 degrees geometry to one C(2,7); one O(1,3); and one O(2,4) atom. The C(1,6)-C(2,7) bond length is 1.48 Å. The C(1,6)-O(1,3) bond length is 1.25 Å. The C(1,6)-O(2,4) bond length is 1.27 Å. In the fourth C site, C(2,7) is bonded in a trigonal planar geometry to one C(1,6); one C(10); and one C(3,8) atom. The C(2,7)-C(3,8) bond length is 1.41 Å. In the fifth C site, C(3,8) is bonded in a single-bond geometry to one C(11); one C(2,7); and one H(1,2) atom. The C(3,8)-C(11) bond length is 1.39 Å. The C(3,8)-H(1,2) bond length is 0.93 Å. In the sixth C site, C(4) is bonded in a 3-coordinate geometry to one C(12), one C(5), and one N(1) atom. The C(4)-C(5) bond length is 1.25 Å. The C(4)-N(1) bond length is 1.43 Å. In the seventh C site, C(5) is bonded in a 2-coordinate geometry to one C(12) and one C(4) atom. In the eighth C site, C(9) is bonded in a 2-coordinate geometry to one C(12) and one N(1) atom. The C(9)-N(1) bond length is 1.25 Å. In the ninth C site, C(11) is bonded in a distorted trigonal planar geometry to one C(12) and two equivalent C(3,8) atoms. N(1) is bonded in a 2-coordinate geometry to one C(12), one C(4), and one C(9) atom. There are two inequivalent H sites. In the first H site, H(1,2) is bonded in a single-bond geometry to one C(3,8) atom. In the second H site, H(3) is bonded in a single-bond geometry to one C(10) atom. There are two inequivalent O sites. In the first O site, O(1,3) is bonded in a distorted single-bond geometry to one Zn(1) and one C(1,6) atom. In the second O site, O(2,4) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one C(1,6) atom. Linkers: 2 [C]12[C@]34N5[C@@]36[C]3[C@@]57[C@@]15N([C@@]246)[C@@]357.[O]C(=O)c1c[c]cc(C([O])=O)c1.[O]C(=O)c1c[c]cc(C([O])=O)c1 ,2 [C]12[C@]34N5[C@]67[C]8[C@@]53[C@@]14N1[C@]26[C@@]817.[O]C(=O)c1c[c]cc(C([O])=O)c1.[O]C(=O)c1c[c]cc(C([O])=O)c1 ,3 [C]12[C@]34N5[C@@]67[C]8[C@]53[C@]14N1[C@@]26[C@@]817.[O]C(=O)c1c[c]cc(C([O])=O)c1.[O]C(=O)c1c[c]cc(C([O])=O)c1 ,2 [C]12[C@]34N5[C@]67[C]8[C@@]53[C@@]14N1[C@]26[C@]817.[O]C(=O)c1c[c]cc(C([O])=O)c1.[O]C(=O)c1c[c]cc(C([O])=O)c1. Metal clusters: 9 [C]1O[Zn]23O[C]O[Zn](O1)(O[C]O2)O[C]O3. RCSR code: nbo. The MOF has largest included sphere 11.44 A, density 0.73 g/cm3, surface area 3527.84 m2/g, accessible volume 1.05 cm3/g