CaC3PH13O11 crystallizes in the monoclinic P2_1 space group. Ca(1) is bonded to one O(10), one O(11), one O(3), one O(5), one O(6), one O(8), and one O(9) atom to form distorted CaO7 pentagonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra. The Ca(1)-O(10) bond length is 2.44 Å. The Ca(1)-O(11) bond length is 2.40 Å. The Ca(1)-O(3) bond length is 2.28 Å. The Ca(1)-O(5) bond length is 2.47 Å. The Ca(1)-O(6) bond length is 2.50 Å. The Ca(1)-O(8) bond length is 2.40 Å. The Ca(1)-O(9) bond length is 2.51 Å. There are three inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(6) and one O(7) atom. The C(1)-O(6) bond length is 1.27 Å. The C(1)-O(7) bond length is 1.27 Å. In the second C site, C(2) is bonded in a distorted water-like geometry to one H(1) and one O(5) atom. The C(2)-H(1) bond length is 1.10 Å. The C(2)-O(5) bond length is 1.42 Å. In the third C site, C(3) is bonded in a distorted trigonal non-coplanar geometry to one H(2), one H(3), and one O(4) atom. The C(3)-H(2) bond length is 1.10 Å. The C(3)-H(3) bond length is 1.10 Å. The C(3)-O(4) bond length is 1.44 Å. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Ca(1)O7 pentagonal bipyramid. The P(1)-O(1) bond length is 1.52 Å. The P(1)-O(2) bond length is 1.59 Å. The P(1)-O(3) bond length is 1.50 Å. The P(1)-O(4) bond length is 1.61 Å. There are thirteen 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(2) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a distorted linear geometry to one O(5) and one O(7) atom. The H(4)-O(5) bond length is 1.01 Å. The H(4)-O(7) bond length is 1.59 Å. In the fifth H site, H(5) is bonded in a linear geometry to one O(2) and one O(9) atom. The H(5)-O(2) bond length is 1.03 Å. The H(5)-O(9) bond length is 1.56 Å. In the sixth H site, H(6) is bonded in a distorted linear geometry to one O(1) and one O(8) atom. The H(6)-O(1) bond length is 1.60 Å. The H(6)-O(8) bond length is 1.01 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one O(8) atom. The H(7)-O(8) bond length is 1.00 Å. In the eighth H site, H(8) is bonded in a single-bond geometry to one O(7) and one O(9) atom. The H(8)-O(7) bond length is 1.69 Å. The H(8)-O(9) bond length is 1.00 Å. In the ninth H site, H(9) is bonded in a distorted linear geometry to one O(6) and one O(9) atom. The H(9)-O(6) bond length is 1.63 Å. The H(9)-O(9) bond length is 1.01 Å. In the tenth H site, H(10) is bonded in a single-bond geometry to one O(10) atom. The H(10)-O(10) bond length is 1.00 Å. In the eleventh H site, H(11) is bonded in a single-bond geometry to one O(10) atom. The H(11)-O(10) bond length is 0.98 Å. In the twelfth H site, H(12) is bonded in a single-bond geometry to one O(11) atom. The H(12)-O(11) bond length is 0.99 Å. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one O(11) atom. The H(13)-O(11) bond length is 0.98 Å. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one P(1) and one H(6) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one P(1) and one H(5) atom. In the third O site, O(3) is bonded in a linear geometry to one Ca(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one C(3) and one P(1) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Ca(1), one C(2), and one H(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Ca(1), one C(1), and one H(9) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one C(1), one H(4), and one H(8) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one Ca(1), one H(6), and one H(7) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to one Ca(1), one H(5), one H(8), and one H(9) atom. In the tenth O site, O(10) is bonded in a water-like geometry to one Ca(1), one H(10), and one H(11) atom. In the eleventh O site, O(11) is bonded in a distorted water-like geometry to one Ca(1), one H(12), and one H(13) atom. Linkers: 1 [O]C(=O)[C@H](O)COP([O])(=O)O. Metal clusters: 2 O.O.O.O.[O]C(=O)[CH]O.[O]P(O)O[Ca]. The MOF has largest included sphere 1.78 A, density 1.86 g/cm3, surface area 3671.72 m2/g, accessible volume 0.11 cm3/g