NaC2P2NH8O6 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(5), one O(6), and two equivalent O(4) atoms. The Na(1)-O(1) bond length is 2.46 Å. The Na(1)-O(2) bond length is 2.84 Å. The Na(1)-O(5) bond length is 2.41 Å. The Na(1)-O(6) bond length is 2.34 Å. There is one shorter (2.24 Å) and one longer (2.58 Å) Na(1)-O(4) bond length. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted tetrahedral geometry to one C(2), one P(1), one P(2), and one N(1) atom. The C(1)-C(2) bond length is 1.53 Å. The C(1)-P(1) bond length is 1.85 Å. The C(1)-P(2) bond length is 1.88 Å. The C(1)-N(1) bond length is 1.49 Å. In the second C site, C(2) is bonded in a trigonal non-coplanar geometry to one C(1), one H(4), one H(5), and one H(6) atom. The C(2)-H(4) bond length is 1.09 Å. The C(2)-H(5) bond length is 1.10 Å. The C(2)-H(6) bond length is 1.10 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 P(2)CO3 tetrahedra and  a cornercorner with one N(1)H3C tetrahedra. The P(1)-O(1) bond length is 1.59 Å. The P(1)-O(2) bond length is 1.52 Å. The P(1)-O(3) bond length is 1.52 Å. In the second P site, P(2) is bonded to one C(1), one O(4), one O(5), and one O(6) atom to form distorted PCO3 tetrahedra that share  a cornercorner with one P(1)CO3 tetrahedra and  a cornercorner with one N(1)H3C tetrahedra. The P(2)-O(4) bond length is 1.51 Å. The P(2)-O(5) bond length is 1.61 Å. The P(2)-O(6) bond length is 1.51 Å. N(1) is bonded to one C(1), one H(2), one H(3), and one H(7) atom to form distorted NH3C tetrahedra that share  a cornercorner with one P(1)CO3 tetrahedra and  a cornercorner with one P(2)CO3 tetrahedra. The N(1)-H(2) bond length is 1.05 Å. The N(1)-H(3) bond length is 1.06 Å. The N(1)-H(7) bond length is 1.04 Å. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(1) and one O(3) atom. The H(1)-O(1) bond length is 1.04 Å. The H(1)-O(3) bond length is 1.46 Å. In the second H site, H(2) is bonded in a single-bond geometry to one N(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one N(1) and one O(6) atom. The H(3)-O(6) bond length is 1.73 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(2) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(2) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(2) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one N(1) atom. In the eighth H site, H(8) is bonded in a linear geometry to one O(2) and one O(5) atom. The H(8)-O(2) bond length is 1.57 Å. The H(8)-O(5) bond length is 1.02 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one P(1), and one H(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Na(1), one P(1), and one H(8) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one P(1) and one H(1) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to two equivalent Na(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one P(2), and one H(8) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(1), one P(2), and one H(3) atom. Linkers: 2 CC(P(=O)(O)[O])(P(=O)([O])O)[NH3]. Metal clusters: 2 [Na]. The MOF has largest included sphere 1.82 A, density 2.00 g/cm3, surface area 3235.07 m2/g, accessible volume 0.05 cm3/g