YC12P3(NO3)3 crystallizes in the trigonal P-3 space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to three equivalent O(1) and three equivalent O(4) atoms to form YO6 octahedra that share corners with three equivalent P(1)CO3 tetrahedra and corners with three equivalent P(2)CO3 tetrahedra. All Y(1)-O(1) bond lengths are 2.26 Å. All Y(1)-O(4) bond lengths are 2.38 Å. In the second Y site, Y(2) is bonded to three equivalent O(2) and three equivalent O(5) atoms to form YO6 octahedra that share corners with three equivalent P(1)CO3 tetrahedra and corners with three equivalent P(2)CO3 tetrahedra. All Y(2)-O(2) bond lengths are 2.32 Å. All Y(2)-O(5) bond lengths are 2.35 Å. There are eight inequivalent C sites. In the first C site, C(1) is bonded in a bent 120 degrees geometry to one P(1) and one N(1) atom. The C(1)-P(1) 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 distorted trigonal non-coplanar geometry to one C(3), one C(8), and one N(1) atom. The C(2)-C(3) bond length is 1.46 Å. The C(2)-C(8) bond length is 1.49 Å. The C(2)-N(1) bond length is 1.50 Å. In the third C site, C(3) is bonded in a distorted trigonal non-coplanar geometry to one C(2), one C(7), and one N(2) atom. The C(3)-C(7) bond length is 1.48 Å. The C(3)-N(2) bond length is 1.48 Å. In the fourth C site, C(4) is bonded in a bent 120 degrees geometry to one P(2) and one N(2) atom. The C(4)-P(2) bond length is 1.89 Å. The C(4)-N(2) bond length is 1.49 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(6) and one N(2) atom. The C(5)-C(6) bond length is 1.45 Å. The C(5)-N(2) bond length is 1.46 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(5) and one N(1) atom. The C(6)-N(1) bond length is 1.45 Å. In the seventh C site, C(7) is bonded in a single-bond geometry to one C(3) atom. In the eighth C site, C(8) is bonded in a single-bond geometry to one C(2) atom. 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 distorted PCO3 tetrahedra that share  a cornercorner with one Y(1)O6 octahedra and  a cornercorner with one Y(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-37°. The P(1)-O(1) bond length is 1.47 Å. The P(1)-O(2) bond length is 1.48 Å. The P(1)-O(3) bond length is 1.51 Å. In the second P site, P(2) is bonded to one C(4), one O(4), one O(5), and one O(6) atom to form distorted PCO3 tetrahedra that share  a cornercorner with one Y(1)O6 octahedra and  a cornercorner with one Y(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-37°. The P(2)-O(4) bond length is 1.51 Å. The P(2)-O(5) bond length is 1.46 Å. The P(2)-O(6) bond length is 1.48 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal non-coplanar geometry to one C(1), one C(2), and one C(6) atom. In the second N site, N(2) is bonded in a trigonal non-coplanar geometry to one C(3), one C(4), and one C(5) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Y(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Y(2) and one P(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Y(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Y(2) and one P(2) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one P(2) atom. Linkers: 6 [C][C]1[C]([C])N([C]P([O])([O])=O)[C][C]N1[C]P([O])([O])=O. Metal clusters: 4 [Y]. The MOF has largest included sphere 5.32 A, density 1.50 g/cm3, surface area 3927.62 m2/g, accessible volume 0.27 cm3/g