Zn3P2H4(CO3)4 crystallizes in the triclinic P-1 space group. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(10), one O(12), and one O(9) atom to form ZnO4 trigonal pyramids that share  a cornercorner with one P(1)CO3 tetrahedra and  a cornercorner with one P(2)CO3 tetrahedra. The Zn(1)-O(1) bond length is 1.96 Å. The Zn(1)-O(10) bond length is 2.13 Å. The Zn(1)-O(12) bond length is 2.12 Å. The Zn(1)-O(9) bond length is 1.92 Å. In the second Zn site, Zn(2) is bonded in a 6-coordinate geometry to one Zn(2), one O(3), two equivalent O(2), and two equivalent O(5) atoms. The Zn(2)-Zn(2) bond length is 0.62 Å. The Zn(2)-O(3) bond length is 2.16 Å. There is one shorter (1.99 Å) and one longer (2.04 Å) Zn(2)-O(2) bond length. There is one shorter (2.06 Å) and one longer (2.09 Å) Zn(2)-O(5) bond length. In the third Zn site, Zn(3) is bonded to one O(11), one O(4), one O(6), one O(7), and two equivalent O(8) atoms to form distorted ZnO6 octahedra that share corners with three equivalent P(2)CO3 tetrahedra and  an edgeedge with one Zn(3)O6 octahedra. The Zn(3)-O(11) bond length is 2.15 Å. The Zn(3)-O(4) bond length is 2.42 Å. The Zn(3)-O(6) bond length is 2.01 Å. The Zn(3)-O(7) bond length is 2.03 Å. There is one shorter (2.04 Å) and one longer (2.05 Å) Zn(3)-O(8) bond length. There are four inequivalent C sites. In the first C site, C(1) is bonded in a 2-coordinate geometry to one P(1), one H(3), and one O(4) atom. The C(1)-P(1) bond length is 1.85 Å. The C(1)-H(3) bond length is 1.04 Å. The C(1)-O(4) bond length is 1.43 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(2)-O(5) bond length is 1.26 Å. The C(2)-O(6) bond length is 1.25 Å. In the third C site, C(3) is bonded in a 2-coordinate geometry to one P(2), one H(4), and one O(10) atom. The C(3)-P(2) bond length is 1.84 Å. The C(3)-H(4) bond length is 0.96 Å. The C(3)-O(10) bond length is 1.42 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(12) atom. The C(4)-O(11) bond length is 1.26 Å. The C(4)-O(12) bond length is 1.25 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one C(1), one O(1), one O(2), and one O(3) atom to form PCO3 tetrahedra that share  a cornercorner with one Zn(1)O4 trigonal pyramid. The P(1)-O(1) bond length is 1.53 Å. The P(1)-O(2) bond length is 1.51 Å. The P(1)-O(3) bond length is 1.53 Å. In the second P site, P(2) is bonded to one C(3), one O(7), one O(8), and one O(9) atom to form distorted PCO3 tetrahedra that share corners with three equivalent Zn(3)O6 octahedra and  a cornercorner with one Zn(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 47-52°. The P(2)-O(7) bond length is 1.52 Å. The P(2)-O(8) bond length is 1.53 Å. The P(2)-O(9) bond length is 1.50 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) atom. The H(1)-O(4) bond length is 0.84 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(10) atom. The H(2)-O(10) bond length is 0.75 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(1) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(3) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Zn(1) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Zn(2) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Zn(2) and one P(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Zn(3), one C(1), and one H(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Zn(2) and one C(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Zn(3) and one C(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Zn(3) and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to two equivalent Zn(3) and one P(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(2) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Zn(1), one C(3), and one H(2) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Zn(3) and one C(4) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(4) atom. Linkers: 2 [O]C(=O)[C@@H](O)P([O])([O])=O ,2 [O]C(=O)[C@H](O)P([O])([O])=O. Metal clusters: 6 [Zn]. The MOF has largest included sphere 3.99 A, density 2.45 g/cm3, surface area 2370.11 m2/g, accessible volume 0.15 cm3/g