Zn(CO3)2 crystallizes in the tetragonal P4_12_12 space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Zn(1)-O(1) bond length is 1.98 Å. The Zn(1)-O(2) bond length is 1.95 Å. The Zn(1)-O(3) bond length is 1.94 Å. The Zn(1)-O(4) bond length is 1.94 Å. In the second Zn site, Zn(2) is bonded in a tetrahedral geometry to two equivalent O(5) and two equivalent O(6) atoms. Both Zn(2)-O(5) bond lengths are 1.97 Å. Both Zn(2)-O(6) bond lengths are 1.95 Å. There are three inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one O(2), one O(3), and one O(7) atom. The C(1)-O(2) bond length is 1.30 Å. The C(1)-O(3) bond length is 1.30 Å. The C(1)-O(7) bond length is 1.25 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(4), one O(6), and one O(8) atom. The C(2)-O(4) bond length is 1.30 Å. The C(2)-O(6) bond length is 1.29 Å. The C(2)-O(8) bond length is 1.26 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one O(1), one O(5), and one O(9) atom. The C(3)-O(1) bond length is 1.31 Å. The C(3)-O(5) bond length is 1.31 Å. The C(3)-O(9) bond length is 1.24 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Zn(1) and one C(3) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(3) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(2) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one C(1) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one C(2) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one C(3) atom. Linkers: 24 [O]C([O])=O. Metal clusters: 12 [Zn]. RCSR code: dia. The MOF has largest included sphere 5.81 A, density 1.17 g/cm3, surface area 3818.03 m2/g, accessible volume 0.61 cm3/g