Zn(HCOO)2 crystallizes in the monoclinic P2_1 space group. There are six inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(14), one O(3), one O(5), one O(7), and one O(9) atom to form a mixture of edge and corner-sharing ZnO6 octahedra. The corner-sharing octahedral tilt angles are 69°. The Zn(1)-O(1) bond length is 2.10 Å. The Zn(1)-O(14) bond length is 2.08 Å. The Zn(1)-O(3) bond length is 2.17 Å. The Zn(1)-O(5) bond length is 2.10 Å. The Zn(1)-O(7) bond length is 2.14 Å. The Zn(1)-O(9) bond length is 2.12 Å. In the second Zn site, Zn(2) is bonded to one O(1), one O(10), one O(11), one O(13), one O(3), and one O(8) atom to form a mixture of distorted face and edge-sharing ZnO6 octahedra. The Zn(2)-O(1) bond length is 2.07 Å. The Zn(2)-O(10) bond length is 2.05 Å. The Zn(2)-O(11) bond length is 2.09 Å. The Zn(2)-O(13) bond length is 2.15 Å. The Zn(2)-O(3) bond length is 2.14 Å. The Zn(2)-O(8) bond length is 2.18 Å. In the third Zn site, Zn(3) is bonded to one O(11), one O(13), one O(24), one O(4), one O(8), and one O(9) atom to form a mixture of distorted face and corner-sharing ZnO6 octahedra. The corner-sharing octahedral tilt angles are 69°. The Zn(3)-O(11) bond length is 2.25 Å. The Zn(3)-O(13) bond length is 2.13 Å. The Zn(3)-O(24) bond length is 2.04 Å. The Zn(3)-O(4) bond length is 2.07 Å. The Zn(3)-O(8) bond length is 2.18 Å. The Zn(3)-O(9) bond length is 2.09 Å. In the fourth Zn site, Zn(4) is bonded to one O(12), one O(15), one O(17), one O(19), one O(22), and one O(6) atom to form edge-sharing ZnO6 octahedra. The Zn(4)-O(12) bond length is 2.09 Å. The Zn(4)-O(15) bond length is 2.14 Å. The Zn(4)-O(17) bond length is 2.12 Å. The Zn(4)-O(19) bond length is 2.14 Å. The Zn(4)-O(22) bond length is 2.13 Å. The Zn(4)-O(6) bond length is 2.13 Å. In the fifth Zn site, Zn(5) is bonded to one O(16), one O(18), one O(19), one O(21), one O(23), and one O(6) atom to form edge-sharing ZnO6 octahedra. The Zn(5)-O(16) bond length is 2.10 Å. The Zn(5)-O(18) bond length is 2.07 Å. The Zn(5)-O(19) bond length is 2.13 Å. The Zn(5)-O(21) bond length is 2.16 Å. The Zn(5)-O(23) bond length is 2.12 Å. The Zn(5)-O(6) bond length is 2.10 Å. In the sixth Zn site, Zn(6) is bonded to one O(15), one O(17), one O(2), one O(20), one O(21), and one O(23) atom to form edge-sharing ZnO6 octahedra. The Zn(6)-O(15) bond length is 2.17 Å. The Zn(6)-O(17) bond length is 2.15 Å. The Zn(6)-O(2) bond length is 2.04 Å. The Zn(6)-O(20) bond length is 2.10 Å. The Zn(6)-O(21) bond length is 2.13 Å. The Zn(6)-O(23) bond length is 2.09 Å. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one H(1), one O(1), and one O(2) atom. The C(1)-H(1) bond length is 1.11 Å. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(2) bond length is 1.25 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one H(2), one O(3), and one O(4) atom. The C(2)-H(2) bond length is 1.11 Å. The C(2)-O(3) bond length is 1.28 Å. The C(2)-O(4) bond length is 1.26 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one H(3), one O(5), and one O(6) atom. The C(3)-H(3) bond length is 1.11 Å. The C(3)-O(5) bond length is 1.25 Å. The C(3)-O(6) bond length is 1.28 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one H(4), one O(7), and one O(8) atom. The C(4)-H(4) bond length is 1.11 Å. The C(4)-O(7) bond length is 1.26 Å. The C(4)-O(8) bond length is 1.28 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one H(5), one O(10), and one O(9) atom. The C(5)-H(5) bond length is 1.10 Å. The C(5)-O(10) bond length is 1.25 Å. The C(5)-O(9) bond length is 1.29 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one H(6), one O(11), and one O(12) atom. The C(6)-H(6) bond length is 1.10 Å. The C(6)-O(11) bond length is 1.27 Å. The C(6)-O(12) bond length is 1.26 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one H(7), one O(13), and one O(14) atom. The C(7)-H(7) bond length is 1.10 Å. The C(7)-O(13) bond length is 1.28 Å. The C(7)-O(14) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one H(8), one O(15), and one O(16) atom. The C(8)-H(8) bond length is 1.11 Å. The C(8)-O(15) bond length is 1.29 Å. The C(8)-O(16) bond length is 1.26 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one H(9), one O(17), and one O(18) atom. The C(9)-H(9) bond length is 1.11 Å. The C(9)-O(17) bond length is 1.28 Å. The C(9)-O(18) bond length is 1.25 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one H(10), one O(19), and one O(20) atom. The C(10)-H(10) bond length is 1.10 Å. The C(10)-O(19) bond length is 1.29 Å. The C(10)-O(20) bond length is 1.25 Å. In the eleventh C site, C(11) is bonded in a trigonal planar geometry to one H(11), one O(21), and one O(22) atom. The C(11)-H(11) bond length is 1.11 Å. The C(11)-O(21) bond length is 1.29 Å. The C(11)-O(22) bond length is 1.26 Å. In the twelfth C site, C(12) is bonded in a trigonal planar geometry to one H(12), one O(23), and one O(24) atom. The C(12)-H(12) bond length is 1.10 Å. The C(12)-O(23) bond length is 1.28 Å. The C(12)-O(24) bond length is 1.26 Å. There are twelve inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(5) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(6) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(7) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(8) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(9) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(10) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(11) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(12) atom. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(6) and one C(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one C(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Zn(3) and one C(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(3) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Zn(4), one Zn(5), and one C(3) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(4) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Zn(2), one Zn(3), and one C(4) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Zn(1), one Zn(3), and one C(5) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(5) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Zn(2), one Zn(3), and one C(6) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Zn(4) and one C(6) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Zn(2), one Zn(3), and one C(7) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(7) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Zn(4), one Zn(6), and one C(8) atom. In the sixteenth O site, O(16) is bonded in a bent 120 degrees geometry to one Zn(5) and one C(8) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal planar geometry to one Zn(4), one Zn(6), and one C(9) atom. In the eighteenth O site, O(18) is bonded in a distorted bent 150 degrees geometry to one Zn(5) and one C(9) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal planar geometry to one Zn(4), one Zn(5), and one C(10) atom. In the twentieth O site, O(20) is bonded in a bent 120 degrees geometry to one Zn(6) and one C(10) atom. In the twenty-first O site, O(21) is bonded in a 3-coordinate geometry to one Zn(5), one Zn(6), and one C(11) atom. In the twenty-second O site, O(22) is bonded in a distorted bent 120 degrees geometry to one Zn(4) and one C(11) atom. In the twenty-third O site, O(23) is bonded in a distorted trigonal planar geometry to one Zn(5), one Zn(6), and one C(12) atom. In the twenty-fourth O site, O(24) is bonded in a bent 120 degrees geometry to one Zn(3) and one C(12) atom. Linkers: 24 [O]C=O. Metal clusters: 12 [Zn]. The MOF has largest included sphere 2.73 A, density 2.38 g/cm3, surface area 2770.29 m2/g, accessible volume 0.08 cm3/g