YC7PNH7O9 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(10), one O(11), one O(14), one O(5), one O(7), one O(8), and one O(9) atom to form distorted YO7 pentagonal bipyramids that share  a cornercorner with one P(2)CO3 tetrahedra. The Y(1)-O(10) bond length is 2.33 Å. The Y(1)-O(11) bond length is 2.37 Å. The Y(1)-O(14) bond length is 2.40 Å. The Y(1)-O(5) bond length is 2.26 Å. The Y(1)-O(7) bond length is 2.38 Å. The Y(1)-O(8) bond length is 2.32 Å. The Y(1)-O(9) bond length is 2.37 Å. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to one O(12), one O(13), one O(15), one O(16), one O(17), one O(18), one O(2), and one O(4) atom. The Y(2)-O(12) bond length is 2.38 Å. The Y(2)-O(13) bond length is 2.42 Å. The Y(2)-O(15) bond length is 2.39 Å. The Y(2)-O(16) bond length is 2.41 Å. The Y(2)-O(17) bond length is 2.38 Å. The Y(2)-O(18) bond length is 2.39 Å. The Y(2)-O(2) bond length is 2.22 Å. The Y(2)-O(4) bond length is 2.30 Å. There are fourteen inequivalent C sites. In the first C site, C(1) is bonded to one P(1); one N(1); and two equivalent H(5,6) atoms to form distorted corner-sharing CPH2N tetrahedra. The C(1)-P(1) bond length is 1.82 Å. The C(1)-N(1) bond length is 1.52 Å. Both C(1)-H(5,6) bond lengths are 0.97 Å. In the second C site, C(2) is bonded to one P(2); one N(1); and two equivalent H(7,8) atoms to form distorted corner-sharing CPH2N tetrahedra. The C(2)-P(2) bond length is 1.86 Å. The C(2)-N(1) bond length is 1.48 Å. Both C(2)-H(7,8) bond lengths are 0.97 Å. In the third C site, C(3) is bonded in a 3-coordinate geometry to one C(4); one N(1); and two equivalent H(9,10) atoms. The C(3)-C(4) bond length is 1.50 Å. The C(3)-N(1) bond length is 1.51 Å. Both C(3)-H(9,10) bond lengths are 0.97 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(8) atom. The C(4)-C(5) bond length is 1.34 Å. The C(4)-C(8) bond length is 1.38 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(4) and one H(11) atom. The C(5)-H(11) bond length is 0.93 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(7) and one H(12) atom. The C(6)-C(7) bond length is 1.34 Å. The C(6)-H(12) bond length is 0.93 Å. In the seventh C site, C(7) is bonded in a distorted trigonal planar geometry to one C(6), one N(2), and one H(13) atom. The C(7)-N(2) bond length is 1.36 Å. The C(7)-H(13) bond length is 0.93 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(4), one N(2), and one H(14) atom. The C(8)-N(2) bond length is 1.38 Å. The C(8)-H(14) bond length is 0.93 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one O(7) and one O(8) atom. The C(9)-O(7) bond length is 1.25 Å. The C(9)-O(8) bond length is 1.25 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(9) atom. The C(10)-O(10) bond length is 1.31 Å. The C(10)-O(9) bond length is 1.21 Å. In the eleventh C site, C(11) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(12) atom. The C(11)-O(11) bond length is 1.24 Å. The C(11)-O(12) bond length is 1.24 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one O(13) and one O(14) atom. The C(12)-O(13) bond length is 1.25 Å. The C(12)-O(14) bond length is 1.27 Å. In the thirteenth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one O(15) and one O(16) atom. The C(13)-O(15) bond length is 1.28 Å. The C(13)-O(16) bond length is 1.22 Å. In the fourteenth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one O(17) and one O(18) atom. The C(14)-O(17) bond length is 1.23 Å. The C(14)-O(18) bond length is 1.23 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded in a distorted tetrahedral geometry to one C(1), one O(1), one O(2), and one O(3) atom. The P(1)-O(1) bond length is 1.49 Å. The P(1)-O(2) bond length is 1.48 Å. The P(1)-O(3) bond length is 1.57 Å. In the second P site, P(2) is bonded to one C(2), one O(4), one O(5), and one O(6) atom to form distorted PCO3 tetrahedra that share  a cornercorner with one Y(1)O7 pentagonal bipyramid. The P(2)-O(4) bond length is 1.50 Å. The P(2)-O(5) bond length is 1.48 Å. The P(2)-O(6) bond length is 1.54 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted single-bond geometry to one C(1), one C(2), one C(3), and one H(3) atom. The N(1)-H(3) bond length is 0.91 Å. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(7), one C(8), and one H(4) atom. The N(2)-H(4) bond length is 0.86 Å. There are eleven inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(3) atom. The H(1)-O(3) bond length is 0.82 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. The H(2)-O(6) bond length is 0.82 Å. In the third H site, H(3) is bonded in a single-bond geometry to one N(1) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(2) atom. In the fifth H site, H(5,6) is bonded in a single-bond geometry to one C(1) atom. In the sixth H site, H(7,8) is bonded in a single-bond geometry to one C(2) atom. In the seventh H site, H(9,10) is bonded in a single-bond geometry to one C(3) atom. In the eighth H site, H(11) is bonded in a single-bond geometry to one C(5) atom. In the ninth H site, H(12) is bonded in a single-bond geometry to one C(6) atom. In the tenth H site, H(13) is bonded in a single-bond geometry to one C(7) atom. In the eleventh H site, H(14) is bonded in a single-bond geometry to one C(8) atom. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to 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 water-like geometry to one P(1) and one H(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Y(2) and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Y(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one P(2) and one H(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one C(9) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Y(1) and one C(9) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Y(1) and one C(10) atom. In the tenth O site, O(14) is bonded in a distorted single-bond geometry to one Y(1) and one C(12) atom. In the eleventh O site, O(15) is bonded in a distorted bent 120 degrees geometry to one Y(2) and one C(13) atom. In the twelfth O site, O(16) is bonded in a distorted bent 120 degrees geometry to one Y(2) and one C(13) atom. In the thirteenth O site, O(17) is bonded in a distorted bent 120 degrees geometry to one Y(2) and one C(14) atom. In the fourteenth O site, O(18) is bonded in a distorted bent 120 degrees geometry to one Y(2) and one C(14) atom. In the fifteenth O site, O(10) is bonded in a bent 120 degrees geometry to one Y(1) and one C(10) atom. In the sixteenth O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one C(11) atom. In the seventeenth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Y(2) and one C(11) atom. In the eighteenth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Y(2) and one C(12) atom. Linkers: 4 [O]P(=O)(C[NH](CP(=O)(O)[O])CC1=CN[CH]C=C1)O ,11 [O]C(=O)C([O])=O. Metal clusters: 8 [Y]. The MOF has largest included sphere 3.95 A, density 1.78 g/cm3, surface area 3260.14 m2/g, accessible volume 0.17 cm3/g