Na2C4N10H6O3 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted octahedral geometry to one N(1), one N(3), one N(4), one N(5), one O(1), and one O(2) atom. The Na(1)-N(1) bond length is 2.41 Å. The Na(1)-N(3) bond length is 2.50 Å. The Na(1)-N(4) bond length is 2.67 Å. The Na(1)-N(5) bond length is 2.43 Å. The Na(1)-O(1) bond length is 2.37 Å. The Na(1)-O(2) bond length is 2.46 Å. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one N(2), one N(9), one O(1), one O(2), and two equivalent O(3) atoms. The Na(2)-N(2) bond length is 2.75 Å. The Na(2)-N(9) bond length is 2.58 Å. The Na(2)-O(1) bond length is 2.51 Å. The Na(2)-O(2) bond length is 2.36 Å. Both Na(2)-O(3) bond lengths are 2.41 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(4), one N(1), and one N(5) atom. The C(1)-C(4) bond length is 1.41 Å. The C(1)-N(1) bond length is 1.35 Å. The C(1)-N(5) bond length is 1.35 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(3), one N(6), and one N(8) atom. The C(2)-C(3) bond length is 1.41 Å. The C(2)-N(6) bond length is 1.35 Å. The C(2)-N(8) bond length is 1.35 Å. In the third C site, C(3) is bonded in a distorted linear geometry to one C(2) and one N(3) atom. The C(3)-N(3) bond length is 1.17 Å. In the fourth C site, C(4) is bonded in a distorted linear geometry to one C(1) and one N(4) atom. The C(4)-N(4) bond length is 1.17 Å. There are ten inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one Na(1), one C(1), and one N(2) atom. The N(1)-N(2) bond length is 1.34 Å. In the second N site, N(2) is bonded in a trigonal planar geometry to one Na(2), one N(1), and one N(7) atom. The N(2)-N(7) bond length is 1.33 Å. In the third N site, N(3) is bonded in a distorted linear geometry to one Na(1) and one C(3) atom. In the fourth N site, N(4) is bonded in a bent 120 degrees geometry to one Na(1) and one C(4) atom. In the fifth N site, N(5) is bonded in a 3-coordinate geometry to one Na(1), one C(1), and one N(7) atom. The N(5)-N(7) bond length is 1.34 Å. In the sixth N site, N(6) is bonded in a distorted water-like geometry to one C(2) and one N(9) atom. The N(6)-N(9) bond length is 1.34 Å. In the seventh N site, N(7) is bonded in a distorted trigonal planar geometry to one N(2), one N(5), and one H(4) atom. The N(7)-H(4) bond length is 1.78 Å. In the eighth N site, N(8) is bonded in a water-like geometry to one C(2) and one N(10) atom. The N(8)-N(10) bond length is 1.34 Å. In the ninth N site, N(9) is bonded in a trigonal planar geometry to one Na(2), one N(10), and one N(6) atom. The N(9)-N(10) bond length is 1.32 Å. In the tenth N site, N(10) is bonded in a 2-coordinate geometry to one N(8) and one N(9) atom. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(2) atom. The H(1)-O(2) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. The H(2)-O(1) bond length is 0.99 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(2) atom. The H(3)-O(2) bond length is 0.98 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(7) and one O(3) atom. The H(4)-O(3) bond length is 1.00 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(1) atom. The H(5)-O(1) bond length is 0.98 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(3) atom. The H(6)-O(3) bond length is 0.99 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Na(1), one Na(2), one H(2), and one H(5) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one Na(1), one Na(2), one H(1), and one H(3) atom. In the third O site, O(3) is bonded in a distorted water-like geometry to two equivalent Na(2), one H(4), and one H(6) atom. Linkers: 2 N#CC1=NN=N[N]1. Metal clusters: 4 [Na]. The MOF has largest included sphere 1.93 A, density 1.62 g/cm3, surface area 3836.04 m2/g, accessible volume 0.10 cm3/g