CrAg(CO2)6 crystallizes in the cubic P2_13 space group. Cr(1) is bonded in an octahedral geometry to three equivalent O(1) and three equivalent O(2) atoms. All Cr(1)-O(1) bond lengths are 1.94 Å. All Cr(1)-O(2) bond lengths are 1.95 Å. Ag(1) is bonded in a distorted pentagonal pyramidal geometry to three equivalent O(3) and three equivalent O(4) atoms. All Ag(1)-O(3) bond lengths are 2.50 Å. All Ag(1)-O(4) bond lengths are 2.36 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(3) atom. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(3) bond length is 1.17 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(4) atom. The C(2)-O(2) bond length is 1.27 Å. The C(2)-O(4) bond length is 1.21 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cr(1) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cr(1) and one C(2) atom. In the third O site, O(3) is bonded in a distorted water-like geometry to one Ag(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ag(1) and one C(2) atom. Linkers: 12 [O]C(=O)C([O])=O. Metal clusters: 4 [Cr] ,4 [Ag]. The MOF has largest included sphere 9.31 A, density 0.76 g/cm3, surface area 3195.60 m2/g, accessible volume 1.02 cm3/g