RbC12N7H4O12 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(2), one O(6), one O(8), and two equivalent O(5) atoms. The Rb(1)-O(1) bond length is 2.93 Å. The Rb(1)-O(10) bond length is 3.06 Å. The Rb(1)-O(11) bond length is 2.95 Å. The Rb(1)-O(12) bond length is 3.00 Å. The Rb(1)-O(2) bond length is 3.21 Å. The Rb(1)-O(6) bond length is 3.20 Å. The Rb(1)-O(8) bond length is 3.09 Å. There is one shorter (3.01 Å) and one longer (3.04 Å) Rb(1)-O(5) bond length. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(5), one C(7), and one N(2) atom. The C(1)-C(5) bond length is 1.46 Å. The C(1)-C(7) bond length is 1.46 Å. The C(1)-N(2) bond length is 1.29 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(10), one C(4), and one H(3) atom. The C(2)-C(10) bond length is 1.39 Å. The C(2)-C(4) bond length is 1.38 Å. The C(2)-H(3) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(5), one C(9), and one H(2) atom. The C(3)-C(5) bond length is 1.38 Å. The C(3)-C(9) bond length is 1.40 Å. The C(3)-H(2) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(2), one C(8), and one N(6) atom. The C(4)-C(8) bond length is 1.45 Å. The C(4)-N(6) bond length is 1.45 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one N(3) atom. The C(5)-N(3) bond length is 1.45 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(7), one C(9), and one H(4) atom. The C(6)-C(7) bond length is 1.38 Å. The C(6)-C(9) bond length is 1.39 Å. The C(6)-H(4) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted trigonal planar geometry to one C(1), one C(6), and one N(5) atom. The C(7)-N(5) bond length is 1.46 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(12), one C(4), and one N(2) atom. The C(8)-C(12) bond length is 1.45 Å. The C(8)-N(2) bond length is 1.30 Å. In the ninth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(3), one C(6), and one N(7) atom. The C(9)-N(7) bond length is 1.43 Å. In the tenth C site, C(10) is bonded in a distorted trigonal planar geometry to one C(11), one C(2), and one N(4) atom. The C(10)-C(11) bond length is 1.39 Å. The C(10)-N(4) bond length is 1.44 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(10), one C(12), and one H(1) atom. The C(11)-C(12) bond length is 1.38 Å. The C(11)-H(1) bond length is 1.09 Å. In the twelfth C site, C(12) is bonded in a distorted trigonal planar geometry to one C(11), one C(8), and one N(1) atom. The C(12)-N(1) bond length is 1.45 Å. There are seven inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one C(12), one O(5), and one O(8) atom. The N(1)-O(5) bond length is 1.25 Å. The N(1)-O(8) bond length is 1.24 Å. In the second N site, N(2) is bonded in a bent 150 degrees geometry to one C(1) and one C(8) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one C(5), one O(11), and one O(9) atom. The N(3)-O(11) bond length is 1.25 Å. The N(3)-O(9) bond length is 1.24 Å. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one C(10), one O(10), and one O(7) atom. The N(4)-O(10) bond length is 1.25 Å. The N(4)-O(7) bond length is 1.25 Å. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one C(7), one O(3), and one O(4) atom. The N(5)-O(3) bond length is 1.24 Å. The N(5)-O(4) bond length is 1.25 Å. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one C(4), one O(12), and one O(2) atom. The N(6)-O(12) bond length is 1.25 Å. The N(6)-O(2) bond length is 1.24 Å. In the seventh N site, N(7) is bonded in a trigonal planar geometry to one C(9), one O(1), and one O(6) atom. The N(7)-O(1) bond length is 1.25 Å. The N(7)-O(6) bond length is 1.25 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(11) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(6) atom. There are twelve inequivalent O sites. In the first O site, O(9) is bonded in a single-bond geometry to one N(3) atom. In the second O site, O(10) is bonded in a distorted single-bond geometry to one Rb(1) and one N(4) atom. In the third O site, O(11) is bonded in a distorted single-bond geometry to one Rb(1) and one N(3) atom. In the fourth O site, O(12) is bonded in a distorted single-bond geometry to one Rb(1) and one N(6) atom. In the fifth O site, O(1) is bonded in a distorted single-bond geometry to one Rb(1) and one N(7) atom. In the sixth O site, O(2) is bonded in a single-bond geometry to one Rb(1) and one N(6) atom. In the seventh O site, O(3) is bonded in a single-bond geometry to one N(5) atom. In the eighth O site, O(4) is bonded in a single-bond geometry to one N(5) atom. In the ninth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one N(1) atom. In the tenth O site, O(6) is bonded in a single-bond geometry to one Rb(1) and one N(7) atom. In the eleventh O site, O(7) is bonded in a single-bond geometry to one N(4) atom. In the twelfth O site, O(8) is bonded in a single-bond geometry to one Rb(1) and one N(1) atom. Linkers: 4 [N]c1cc(N=O)c([N]c2c([N][O])cc([N][O])cc2[N+](=O)[O-])c([N+](=O)[O-])c1. Metal clusters: 2 [O]N=O.[O]N=O.[O][N]O[Rb].[O][N]O[Rb].[O][N][O].[O][N][O].[O][N][O].[O][N][O].[O][N][O].[O][N][O]. RCSR code: sql. The MOF has largest included sphere 2.59 A, density 1.93 g/cm3, surface area 3651.55 m2/g, accessible volume 0.12 cm3/g