Sm2Cu3C24P6H18(NO3)6(CH)6 crystallizes in the trigonal R-3 space group. The structure consists of eighteen 02329_fluka molecules inside a Sm2Cu3C24P6H18(NO3)6 framework. In the Sm2Cu3C24P6H18(NO3)6 framework, there are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to six equivalent O(3) atoms to form SmO6 octahedra that share corners with six equivalent P(1)CO3 tetrahedra. All Sm(1)-O(3) bond lengths are 2.31 Å. In the second Sm site, Sm(2) is bonded to six equivalent O(2) atoms to form SmO6 octahedra that share corners with six equivalent P(1)CO3 tetrahedra. All Sm(2)-O(2) bond lengths are 2.30 Å. Cu(1) is bonded in a square co-planar geometry to two equivalent N(1) and two equivalent O(1) atoms. Both Cu(1)-N(1) bond lengths are 1.99 Å. Both Cu(1)-O(1) bond lengths are 1.94 Å. There are four inequivalent C sites. In the first C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one N(1), and one H(4) atom. The C(5)-C(4) bond length is 1.39 Å. The C(5)-N(1) bond length is 1.35 Å. The C(5)-H(4) bond length is 1.09 Å. In the second C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one P(1), and one N(1) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-P(1) bond length is 1.83 Å. The C(1)-N(1) bond length is 1.35 Å. In the third C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(1) atom. The C(2)-H(1) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(5) and one H(3) atom. The C(4)-H(3) bond length is 1.09 Å. 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 Sm(1)O6 octahedra and  a cornercorner with one Sm(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-35°. The P(1)-O(1) bond length is 1.55 Å. The P(1)-O(2) bond length is 1.52 Å. The P(1)-O(3) bond length is 1.52 Å. N(1) is bonded in a trigonal planar geometry to one Cu(1), one C(1), and one C(5) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(3) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(5) atom. There are three inequivalent O sites. In the first O site, O(3) is bonded in a bent 150 degrees geometry to one Sm(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Sm(2) and one P(1) atom. In the third O site, O(1) is bonded in a bent 120 degrees geometry to one Cu(1) and one P(1) atom. Linkers: 6 [O]P([O])(=O)c1ccccn1. Metal clusters: 2 [Sm] ,3 [Cu]. The MOF has largest included sphere 2.06 A, density 2.26 g/cm3, surface area 3235.11 m2/g, accessible volume 0.07 cm3/g