Mg3H12(C2O)14(CH)6 crystallizes in the monoclinic P2_1/c space group. The structure consists of twenty-four 02329_fluka molecules inside a Mg3H12(C2O)14 framework. In the Mg3H12(C2O)14 framework, there are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(10), one O(11), one O(13), one O(6), and one O(7) atom to form MgO6 octahedra that share  a cornercorner with one Mg(2)O6 octahedra and  a cornercorner with one Mg(3)O5 square pyramid. The corner-sharing octahedral tilt angles are 65°. The Mg(1)-O(1) bond length is 2.01 Å. The Mg(1)-O(10) bond length is 2.08 Å. The Mg(1)-O(11) bond length is 2.11 Å. The Mg(1)-O(13) bond length is 2.13 Å. The Mg(1)-O(6) bond length is 2.04 Å. The Mg(1)-O(7) bond length is 2.06 Å. In the second Mg site, Mg(2) is bonded to one O(12), one O(13), one O(3), one O(4), one O(5), and one O(9) atom to form MgO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra and  a cornercorner with one Mg(3)O5 square pyramid. The corner-sharing octahedral tilt angles are 65°. The Mg(2)-O(12) bond length is 2.04 Å. The Mg(2)-O(13) bond length is 2.05 Å. The Mg(2)-O(3) bond length is 2.13 Å. The Mg(2)-O(4) bond length is 2.18 Å. The Mg(2)-O(5) bond length is 2.05 Å. The Mg(2)-O(9) bond length is 2.02 Å. In the third Mg site, Mg(3) is bonded to one O(11), one O(14), one O(2), one O(3), and one O(8) atom to form corner-sharing MgO5 square pyramids. The corner-sharing octahedral tilt angles are 65°. The Mg(3)-O(11) bond length is 2.12 Å. The Mg(3)-O(14) bond length is 2.07 Å. The Mg(3)-O(2) bond length is 2.04 Å. The Mg(3)-O(3) bond length is 2.08 Å. The Mg(3)-O(8) bond length is 2.06 Å. There are twenty-eight 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 1.53 Å. The C(1)-O(1) bond length is 1.25 Å. The C(1)-O(2) bond length is 1.24 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(7) atom. The C(2)-C(3) bond length is 1.35 Å. The C(2)-C(7) bond length is 1.44 Å. In the third C site, C(3) is bonded in a 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(4) is bonded in a distorted single-bond geometry to one C(5) and one H(2) atom. The C(4)-C(5) bond length is 1.36 Å. The C(4)-H(2) bond length is 0.95 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(12), one C(4), and one C(6) atom. The C(5)-C(12) bond length is 1.49 Å. The C(5)-C(6) bond length is 1.44 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(11), one C(5), and one C(7) atom. The C(6)-C(11) bond length is 1.40 Å. The C(6)-C(7) bond length is 1.43 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(2), one C(6), and one C(8) atom. The C(7)-C(8) bond length is 1.42 Å. In the eighth C site, C(8) is bonded in a single-bond geometry to one C(7) and one H(3) atom. The C(8)-H(3) bond length is 0.95 Å. In the ninth C site, C(11) is bonded in a distorted single-bond geometry to one C(6) and one H(6) atom. The C(11)-H(6) bond length is 0.95 Å. In the tenth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(3), and one O(4) atom. The C(12)-O(3) bond length is 1.29 Å. The C(12)-O(4) bond length is 1.26 Å. In the eleventh C site, C(13) is bonded in a distorted bent 120 degrees geometry to one C(15), one O(5), and one O(6) atom. The C(13)-C(15) bond length is 1.52 Å. The C(13)-O(5) bond length is 1.24 Å. The C(13)-O(6) bond length is 1.25 Å. In the twelfth C site, C(14) is bonded in a trigonal planar geometry to one C(15), one C(16), and one C(33) atom. The C(14)-C(15) bond length is 1.38 Å. The C(14)-C(16) bond length is 1.44 Å. The C(14)-C(33) bond length is 1.51 Å. In the thirteenth C site, C(15) is bonded in a trigonal planar geometry to one C(13), one C(14), and one C(16) atom. The C(15)-C(16) bond length is 1.37 Å. In the fourteenth C site, C(16) is bonded in a trigonal planar geometry to one C(14), one C(15), and one C(17) atom. The C(16)-C(17) bond length is 1.48 Å. In the fifteenth C site, C(17) is bonded in a distorted single-bond geometry to one C(16) and one H(7) atom. The C(17)-H(7) bond length is 0.95 Å. In the sixteenth C site, C(19) is bonded in a distorted bent 120 degrees geometry to one C(20), one O(7), and one O(8) atom. The C(19)-C(20) bond length is 1.51 Å. The C(19)-O(7) bond length is 1.25 Å. The C(19)-O(8) bond length is 1.24 Å. In the seventeenth C site, C(20) is bonded in a trigonal planar geometry to one C(19), one C(21), and one C(25) atom. The C(20)-C(21) bond length is 1.34 Å. The C(20)-C(25) bond length is 1.44 Å. In the eighteenth C site, C(21) is bonded in a distorted single-bond geometry to one C(20) and one H(9) atom. The C(21)-H(9) bond length is 0.95 Å. In the nineteenth C site, C(22) is bonded in a distorted single-bond geometry to one C(23) and one H(10) atom. The C(22)-C(23) bond length is 1.38 Å. The C(22)-H(10) bond length is 0.95 Å. In the twentieth C site, C(23) is bonded in a trigonal planar geometry to one C(22), one C(24), and one C(30) atom. The C(23)-C(24) bond length is 1.41 Å. The C(23)-C(30) bond length is 1.51 Å. In the twenty-first C site, C(24) is bonded in a trigonal planar geometry to one C(23), one C(25), and one C(29) atom. The C(24)-C(25) bond length is 1.44 Å. The C(24)-C(29) bond length is 1.42 Å. In the twenty-second C site, C(25) is bonded in a trigonal planar geometry to one C(20), one C(24), and one C(26) atom. The C(25)-C(26) bond length is 1.42 Å. In the twenty-third C site, C(26) is bonded in a distorted single-bond geometry to one C(25) and one H(11) atom. The C(26)-H(11) bond length is 0.95 Å. In the twenty-fourth C site, C(29) is bonded in a single-bond geometry to one C(24) and one H(14) atom. The C(29)-H(14) bond length is 0.95 Å. In the twenty-fifth C site, C(30) is bonded in a distorted bent 120 degrees geometry to one C(23), one O(10), and one O(9) atom. The C(30)-O(10) bond length is 1.24 Å. The C(30)-O(9) bond length is 1.26 Å. In the twenty-sixth C site, C(31) is bonded in a trigonal planar geometry to one H(15), one O(11), and one O(12) atom. The C(31)-H(15) bond length is 0.95 Å. The C(31)-O(11) bond length is 1.25 Å. The C(31)-O(12) bond length is 1.25 Å. In the twenty-seventh C site, C(32) is bonded in a trigonal planar geometry to one H(16), one O(13), and one O(14) atom. The C(32)-H(16) bond length is 0.95 Å. The C(32)-O(13) bond length is 1.27 Å. The C(32)-O(14) bond length is 1.22 Å. In the twenty-eighth C site, C(33) is bonded in a distorted single-bond geometry to one C(14) and one H(17) atom. The C(33)-H(17) bond length is 0.95 Å. There are twelve 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(2) is bonded in a single-bond geometry to one C(4) 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(6) is bonded in a single-bond geometry to one C(11) atom. In the fifth H site, H(7) is bonded in a single-bond geometry to one C(17) atom. In the sixth H site, H(9) is bonded in a single-bond geometry to one C(21) atom. In the seventh H site, H(10) is bonded in a single-bond geometry to one C(22) atom. In the eighth H site, H(11) is bonded in a single-bond geometry to one C(26) atom. In the ninth H site, H(14) is bonded in a single-bond geometry to one C(29) atom. In the tenth H site, H(15) is bonded in a single-bond geometry to one C(31) atom. In the eleventh H site, H(16) is bonded in a single-bond geometry to one C(32) atom. In the twelfth H site, H(17) is bonded in a single-bond geometry to one C(33) atom. There are fourteen inequivalent O sites. In the first O site, O(10) is bonded in a bent 150 degrees geometry to one Mg(1) and one C(30) atom. In the second O site, O(11) is bonded in a trigonal planar geometry to one Mg(1), one Mg(3), and one C(31) atom. In the third O site, O(12) is bonded in a bent 150 degrees geometry to one Mg(2) and one C(31) atom. In the fourth O site, O(13) is bonded in a trigonal planar geometry to one Mg(1), one Mg(2), and one C(32) atom. In the fifth O site, O(14) is bonded in a bent 150 degrees geometry to one Mg(3) and one C(32) atom. In the sixth O site, O(1) is bonded in a bent 150 degrees geometry to one Mg(1) and one C(1) atom. In the seventh O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Mg(3) and one C(1) atom. In the eighth O site, O(3) is bonded in a 3-coordinate geometry to one Mg(2), one Mg(3), and one C(12) atom. In the ninth O site, O(4) is bonded in an L-shaped geometry to one Mg(2) and one C(12) atom. In the tenth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Mg(2) and one C(13) atom. In the eleventh O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Mg(1) and one C(13) atom. In the twelfth O site, O(7) is bonded in a bent 120 degrees geometry to one Mg(1) and one C(19) atom. In the thirteenth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Mg(3) and one C(19) atom. In the fourteenth O site, O(9) is bonded in a bent 120 degrees geometry to one Mg(2) and one C(30) atom. Linkers: 8 [O]C(=O)c1ccc(C([O])=O)c2ccccc12 ,2 [O]C(=O)c1c2ccccc2c(C([O])=O)c2ccccc12. Metal clusters: 12 [Mg]. The MOF has largest included sphere 5.60 A, density 1.13 g/cm3, surface area 4267.17 m2/g, accessible volume 0.45 cm3/g