Mg(CH3COO)2 crystallizes in the orthorhombic Fdd2 space group. The structure consists of forty-eight 02329_fluka molecules inside a MgC2O4 framework. In the MgC2O4 framework, there are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), one O(5), and one O(6) atom. The Mg(1)-O(1) bond length is 2.06 Å. The Mg(1)-O(3) bond length is 2.06 Å. The Mg(1)-O(5) bond length is 2.06 Å. The Mg(1)-O(6) bond length is 2.05 Å. In the second Mg site, Mg(2) is bonded in a see-saw-like geometry to two equivalent O(2) and two equivalent O(4) atoms. Both Mg(2)-O(2) bond lengths are 2.05 Å. Both Mg(2)-O(4) bond lengths are 2.06 Å. There are three inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.25 Å. The C(1)-O(2) bond length is 1.26 Å. In the second C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(3)-O(3) bond length is 1.27 Å. The C(3)-O(4) bond length is 1.25 Å. In the third C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(5)-O(5) bond length is 1.25 Å. The C(5)-O(6) bond length is 1.27 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Mg(2) and one C(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one C(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Mg(2) and one C(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one C(5) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one C(5) atom. Linkers: 12 CC([O])=O. Metal clusters: 6 [Mg]. RCSR code: dia. The MOF has largest included sphere 4.03 A, density 0.96 g/cm3, surface area 5632.77 m2/g, accessible volume 0.57 cm3/g