SrPH7(CO4)2 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(7), and one O(8) atom to form SrO6 octahedra that share corners with two equivalent P(1)CO3 tetrahedra. The Sr(1)-O(1) bond length is 2.41 Å. The Sr(1)-O(2) bond length is 2.57 Å. The Sr(1)-O(4) bond length is 2.55 Å. The Sr(1)-O(5) bond length is 2.57 Å. The Sr(1)-O(7) bond length is 2.60 Å. The Sr(1)-O(8) bond length is 2.42 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 4-coordinate geometry to one C(2), one P(1), one H(7), and one O(4) atom. The C(1)-C(2) bond length is 1.53 Å. The C(1)-P(1) bond length is 1.86 Å. The C(1)-H(7) bond length is 1.10 Å. The C(1)-O(4) bond length is 1.44 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(5), and one O(6) atom. The C(2)-O(5) bond length is 1.27 Å. The C(2)-O(6) bond length is 1.27 Å. P(1) is bonded to one C(1), one O(1), one O(2), and one O(3) atom to form PCO3 tetrahedra that share corners with two equivalent Sr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-58°. The P(1)-O(1) bond length is 1.51 Å. The P(1)-O(2) bond length is 1.54 Å. The P(1)-O(3) bond length is 1.58 Å. There are seven inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(3) and one O(6) atom. The H(1)-O(3) bond length is 1.03 Å. The H(1)-O(6) bond length is 1.54 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(4) atom. The H(2)-O(4) bond length is 1.00 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(7) atom. The H(3)-O(7) bond length is 1.00 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(2) and one O(7) atom. The H(4)-O(2) bond length is 1.76 Å. The H(4)-O(7) bond length is 1.00 Å. In the fifth H site, H(5) is bonded in a distorted linear geometry to one O(2) and one O(8) atom. The H(5)-O(2) bond length is 1.64 Å. The H(5)-O(8) bond length is 1.00 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(6) and one O(8) atom. The H(6)-O(6) bond length is 1.71 Å. The H(6)-O(8) bond length is 0.99 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(1) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one P(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(1), one P(1), one H(4), and one H(5) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one P(1) and one H(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(1), one C(1), and one H(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Sr(1) and one C(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one C(2), one H(1), and one H(6) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one Sr(1), one H(3), and one H(4) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one Sr(1), one H(5), and one H(6) atom. Linkers: 2 [O]C(=O)[C@H](O)P([O])(=O)O ,2 [O]C(=O)[C@@H](O)P([O])(=O)O. Metal clusters: 4 [Sr]. The MOF has largest included sphere 1.42 A, density 2.38 g/cm3, surface area 3058.74 m2/g, accessible volume 0.09 cm3/g