Gd2C9P2NH10O16 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(12), one O(14), one O(3), one O(7), one O(8), and one O(9) atom. The Gd(1)-O(1) bond length is 2.31 Å. The Gd(1)-O(10) bond length is 2.43 Å. The Gd(1)-O(12) bond length is 2.49 Å. The Gd(1)-O(14) bond length is 2.42 Å. The Gd(1)-O(3) bond length is 2.33 Å. The Gd(1)-O(7) bond length is 2.41 Å. The Gd(1)-O(8) bond length is 2.38 Å. The Gd(1)-O(9) bond length is 2.41 Å. In the second Gd site, Gd(2) is bonded in a 6-coordinate geometry to one O(11), one O(13), one O(15), one O(16), one O(4), and one O(6) atom. The Gd(2)-O(11) bond length is 2.45 Å. The Gd(2)-O(13) bond length is 2.44 Å. The Gd(2)-O(15) bond length is 2.45 Å. The Gd(2)-O(16) bond length is 2.43 Å. The Gd(2)-O(4) bond length is 2.29 Å. The Gd(2)-O(6) bond length is 2.31 Å. There are nine inequivalent C sites. In the first C site, C(1) is bonded to one P(1); one N(1); and two equivalent H(3,4) atoms to form distorted corner-sharing CPH2N tetrahedra. The C(1)-P(1) bond length is 1.80 Å. The C(1)-N(1) bond length is 1.51 Å. Both C(1)-H(3,4) bond lengths are 0.97 Å. In the second C site, C(2) is bonded to one P(2), one N(1), one H(5), and one H(6) atom to form distorted corner-sharing CPH2N tetrahedra. The C(2)-P(2) bond length is 1.82 Å. The C(2)-N(1) bond length is 1.50 Å. The C(2)-H(5) bond length is 0.97 Å. The C(2)-H(6) bond length is 0.97 Å. In the third C site, C(3) is bonded in a 3-coordinate geometry to one N(1), one H(7), and one H(8) atom. The C(3)-N(1) bond length is 1.50 Å. The C(3)-H(7) bond length is 0.97 Å. The C(3)-H(8) bond length is 0.97 Å. In the fourth C site, C(4) is bonded in a distorted trigonal non-coplanar geometry to two equivalent H(9,10) and one O(2) atom. Both C(4)-H(9,10) bond lengths are 0.97 Å. The C(4)-O(2) bond length is 1.46 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(7) and one O(8) atom. The C(5)-O(7) bond length is 1.25 Å. The C(5)-O(8) bond length is 1.26 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(9) atom. The C(6)-O(10) bond length is 1.26 Å. The C(6)-O(9) bond length is 1.26 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(12) atom. The C(7)-O(11) bond length is 1.23 Å. The C(7)-O(12) bond length is 1.26 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one O(13) and one O(14) atom. The C(8)-O(13) bond length is 1.25 Å. The C(8)-O(14) bond length is 1.25 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one O(15) and one O(16) atom. The C(9)-O(15) bond length is 1.26 Å. The C(9)-O(16) bond length is 1.27 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded in a 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 1.48 Å. The P(1)-O(2) bond length is 1.59 Å. The P(1)-O(3) bond length is 1.49 Å. In the second P site, P(2) is bonded in a distorted tetrahedral geometry to one C(2), one O(4), one O(5), and one O(6) atom. The P(2)-O(4) bond length is 1.48 Å. The P(2)-O(5) bond length is 1.56 Å. The P(2)-O(6) bond length is 1.49 Å. N(1) is bonded in a distorted single-bond geometry to one C(1), one C(2), one C(3), and one H(2) atom. The N(1)-H(2) bond length is 0.91 Å. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. The H(1)-O(5) bond length is 0.82 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(3,4) is bonded in a single-bond geometry to one C(1) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(2) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one C(2) atom. In the sixth H site, H(7) is bonded in a single-bond geometry to one C(3) atom. In the seventh H site, H(8) is bonded in a single-bond geometry to one C(3) atom. In the eighth H site, H(9,10) is bonded in a single-bond geometry to one C(4) atom. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Gd(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one C(4) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Gd(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Gd(2) and one P(2) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one P(2) and one H(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Gd(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Gd(1) and one C(5) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Gd(1) and one C(5) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Gd(1) and one C(6) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Gd(1) and one C(6) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Gd(2) and one C(7) atom. In the twelfth O site, O(12) is bonded in a 2-coordinate geometry to one Gd(1) and one C(7) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one Gd(2) and one C(8) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Gd(1) and one C(8) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one Gd(2) and one C(9) atom. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one Gd(2) and one C(9) atom. Linkers: 10 [O]C(=O)C([O])=O ,4 [O]P(=O)(C[NH]1CCO[P@@](=O)(C1)[O])O. Metal clusters: 8 [Gd]. The MOF has largest included sphere 4.59 A, density 2.01 g/cm3, surface area 2583.99 m2/g, accessible volume 0.22 cm3/g