Gd3C11PNH9O19 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 8-coordinate geometry to one O(10), one O(12), one O(13), one O(14), one O(2), one O(3), one O(6), and one O(8) atom. The Gd(1)-O(10) bond length is 2.42 Å. The Gd(1)-O(12) bond length is 2.44 Å. The Gd(1)-O(13) bond length is 2.54 Å. The Gd(1)-O(14) bond length is 2.41 Å. The Gd(1)-O(2) bond length is 2.42 Å. The Gd(1)-O(3) bond length is 2.46 Å. The Gd(1)-O(6) bond length is 2.45 Å. The Gd(1)-O(8) bond length is 2.42 Å. In the second Gd site, Gd(2) is bonded to one O(1), one O(11), one O(19), one O(4), one O(5), one O(7), and one O(9) atom to form distorted GdO7 pentagonal bipyramids that share  a cornercorner with one P(1)CO3 tetrahedra. The Gd(2)-O(1) bond length is 2.37 Å. The Gd(2)-O(11) bond length is 2.43 Å. The Gd(2)-O(19) bond length is 2.22 Å. The Gd(2)-O(4) bond length is 2.45 Å. The Gd(2)-O(5) bond length is 2.42 Å. The Gd(2)-O(7) bond length is 2.39 Å. The Gd(2)-O(9) bond length is 2.38 Å. In the third Gd site, Gd(3) is bonded in a 4-coordinate geometry to one O(15), one O(16), one O(17), and one O(18) atom. The Gd(3)-O(15) bond length is 2.46 Å. The Gd(3)-O(16) bond length is 2.48 Å. The Gd(3)-O(17) bond length is 2.24 Å. The Gd(3)-O(18) bond length is 2.28 Å. There are eleven inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.24 Å. The C(1)-O(2) bond length is 1.26 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(2)-O(3) bond length is 1.25 Å. The C(2)-O(4) bond length is 1.26 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(3)-O(5) bond length is 1.24 Å. The C(3)-O(6) bond length is 1.25 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(7) and one O(8) atom. The C(4)-O(7) bond length is 1.25 Å. The C(4)-O(8) bond length is 1.24 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(12) atom. The C(5)-O(11) bond length is 1.25 Å. The C(5)-O(12) bond length is 1.27 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 1.22 Å. The C(6)-O(9) bond length is 1.28 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one O(13) and one O(14) atom. The C(7)-O(13) bond length is 1.23 Å. The C(7)-O(14) bond length is 1.27 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one O(15) and one O(16) atom. The C(8)-O(15) bond length is 1.27 Å. The C(8)-O(16) bond length is 1.24 Å. In the ninth C site, C(9) is bonded to one P(1); one N(1); and two equivalent H(2,3) atoms to form distorted corner-sharing CPH2N tetrahedra. The C(9)-P(1) bond length is 1.83 Å. The C(9)-N(1) bond length is 1.43 Å. Both C(9)-H(2,3) bond lengths are 0.97 Å. In the tenth C site, C(10) is bonded to one N(1); one H(4); and two equivalent H(5,6) atoms to form CH3N tetrahedra that share  a cornercorner with one C(11)H3N tetrahedra and  a cornercorner with one C(9)PH2N tetrahedra. The C(10)-N(1) bond length is 1.55 Å. The C(10)-H(4) bond length is 0.96 Å. Both C(10)-H(5,6) bond lengths are 0.96 Å. In the eleventh C site, C(11) is bonded to one N(1), one H(7), one H(8), and one H(9) atom to form CH3N tetrahedra that share  a cornercorner with one C(10)H3N tetrahedra and  a cornercorner with one C(9)PH2N tetrahedra. The C(11)-N(1) bond length is 1.44 Å. The C(11)-H(7) bond length is 0.96 Å. The C(11)-H(8) bond length is 0.96 Å. The C(11)-H(9) bond length is 0.96 Å. P(1) is bonded to one C(9), one O(17), one O(18), and one O(19) atom to form PCO3 tetrahedra that share  a cornercorner with one Gd(2)O7 pentagonal bipyramid and  a cornercorner with one N(1)HC3 tetrahedra. The P(1)-O(17) bond length is 1.48 Å. The P(1)-O(18) bond length is 1.50 Å. The P(1)-O(19) bond length is 1.51 Å. N(1) is bonded to one C(10), one C(11), one C(9), and one H(1) atom to form distorted NHC3 tetrahedra that share  a cornercorner with one P(1)CO3 tetrahedra. The N(1)-H(1) bond length is 0.91 Å. There are seven inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(1) atom. In the second H site, H(2,3) is bonded in a single-bond geometry to one C(9) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(10) atom. In the fourth H site, H(5,6) is bonded in a single-bond geometry to one C(10) atom. In the fifth H site, H(7) is bonded in a single-bond geometry to one C(11) atom. In the sixth H site, H(8) is bonded in a single-bond geometry to one C(11) atom. In the seventh H site, H(9) is bonded in a single-bond geometry to one C(11) atom. There are nineteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Gd(2) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Gd(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Gd(1) and one C(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Gd(2) and one C(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Gd(2) and one C(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Gd(1) and one C(3) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Gd(2) and one C(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Gd(1) and one C(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Gd(2) 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(5) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Gd(1) and one C(5) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one Gd(1) and one C(7) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 120 degrees geometry to one Gd(1) and one C(7) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one Gd(3) and one C(8) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 120 degrees geometry to one Gd(3) and one C(8) atom. In the seventeenth O site, O(17) is bonded in a distorted linear geometry to one Gd(3) and one P(1) atom. In the eighteenth O site, O(18) is bonded in a distorted bent 150 degrees geometry to one Gd(3) and one P(1) atom. In the nineteenth O site, O(19) is bonded in a bent 150 degrees geometry to one Gd(2) and one P(1) atom. Linkers: 14 [O]C(=O)C([O])=O. Metal clusters: 12 [Gd]. The MOF has largest included sphere 4.86 A, density 1.94 g/cm3, surface area 2562.77 m2/g, accessible volume 0.22 cm3/g