Mg4C23H11O16(CH)3 crystallizes in the orthorhombic Fdd2 space group. The structure consists of twenty-four 02329_fluka molecules inside a Mg4C23H11O16 framework. In the Mg4C23H11O16 framework, there are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(3), one O(5), one O(6), and one O(7) atom to form a mixture of edge and corner-sharing MgO5 square pyramids. The corner-sharing octahedral tilt angles are 64°. The Mg(1)-O(1) bond length is 2.15 Å. The Mg(1)-O(3) bond length is 2.10 Å. The Mg(1)-O(5) bond length is 2.20 Å. The Mg(1)-O(6) bond length is 2.01 Å. The Mg(1)-O(7) bond length is 2.03 Å. In the second Mg site, Mg(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form a mixture of edge and corner-sharing MgO6 octahedra. The Mg(2)-O(1) bond length is 2.21 Å. The Mg(2)-O(2) bond length is 2.00 Å. The Mg(2)-O(3) bond length is 2.16 Å. The Mg(2)-O(4) bond length is 2.14 Å. The Mg(2)-O(5) bond length is 2.10 Å. The Mg(2)-O(8) bond length is 2.03 Å. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a bent 120 degrees geometry to one C(9), one O(3), and one O(4) atom. The C(1)-C(9) bond length is 1.48 Å. The C(1)-O(3) bond length is 1.28 Å. The C(1)-O(4) bond length is 1.28 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(11), one C(14), and one C(5) atom. The C(2)-C(11) bond length is 1.41 Å. The C(2)-C(14) bond length is 1.41 Å. The C(2)-C(5) bond length is 1.50 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(2), and one O(6) atom. The C(3)-C(4) bond length is 1.51 Å. The C(3)-O(2) bond length is 1.25 Å. The C(3)-O(6) bond length is 1.26 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(10), one C(3), and one C(6) atom. The C(4)-C(10) bond length is 1.37 Å. The C(4)-C(6) bond length is 1.39 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(7), and one O(8) atom. The C(5)-O(7) bond length is 1.26 Å. The C(5)-O(8) bond length is 1.28 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(4), one C(9), and one H(1) atom. The C(6)-C(9) bond length is 1.39 Å. The C(6)-H(1) bond length is 0.93 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one H(2), one O(1), and one O(5) atom. The C(7)-H(2) bond length is 0.93 Å. The C(7)-O(1) bond length is 1.27 Å. The C(7)-O(5) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(9) and one H(3) atom. The C(8)-C(9) bond length is 1.37 Å. The C(8)-H(3) bond length is 0.93 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(1), one C(6), and one C(8) atom. In the tenth C site, C(10) is bonded in a single-bond geometry to one C(4) and one H(4) atom. The C(10)-H(4) bond length is 0.93 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(2) and one H(5) atom. The C(11)-H(5) bond length is 0.93 Å. In the twelfth C site, C(14) is bonded in a distorted single-bond geometry to two equivalent C(2) and one H(8) atom. The C(14)-H(8) bond length is 0.93 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(6) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(7) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(8) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(10) atom. In the fifth H site, H(5) 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(14) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mg(2), and one C(7) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Mg(2) and one C(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Mg(2), and one C(1) atom. In the fourth O site, O(4) is bonded in an L-shaped geometry to one Mg(2) and one C(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mg(2), and one C(7) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Mg(1) and one C(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one C(5) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Mg(2) and one C(5) atom. Linkers: 6 [O]C(=O)c1cccc(C([O])=O)c1. Metal clusters: 8 [Mg]. The MOF has largest included sphere 5.35 A, density 1.19 g/cm3, surface area 4117.07 m2/g, accessible volume 0.34 cm3/g