Mn2C3P2H3O14 crystallizes in the triclinic P-1 space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(10), one O(12), one O(14), one O(5), and one O(9) atom to form MnO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra and  a cornercorner with one P(2)O4 tetrahedra. The Mn(1)-O(1) bond length is 2.13 Å. The Mn(1)-O(10) bond length is 2.25 Å. The Mn(1)-O(12) bond length is 2.27 Å. The Mn(1)-O(14) bond length is 2.22 Å. The Mn(1)-O(5) bond length is 2.14 Å. The Mn(1)-O(9) bond length is 2.17 Å. In the second Mn site, Mn(2) is bonded to one O(11), one O(13), one O(6), and two equivalent O(3) atoms to form MnO5 square pyramids that share  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and  an edgeedge with one Mn(2)O5 square pyramid. The Mn(2)-O(11) bond length is 2.19 Å. The Mn(2)-O(13) bond length is 2.26 Å. The Mn(2)-O(6) bond length is 2.14 Å. There is one shorter (2.18 Å) and one longer (2.19 Å) Mn(2)-O(3) bond length. 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(10) and one O(9) atom. The C(1)-O(10) bond length is 1.25 Å. The C(1)-O(9) bond length is 1.25 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(12) atom. The C(2)-O(11) bond length is 1.24 Å. The C(2)-O(12) bond length is 1.25 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(13) and one O(14) atom. The C(3)-O(13) bond length is 1.24 Å. The C(3)-O(14) bond length is 1.24 Å. There are two inequivalent P sites. In the first P site, 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 Mn(1)O6 octahedra and corners with two equivalent Mn(2)O5 square pyramids. The corner-sharing octahedral tilt angles are 38°. The P(1)-O(1) bond length is 1.52 Å. The P(1)-O(2) bond length is 1.52 Å. The P(1)-O(3) bond length is 1.54 Å. The P(1)-O(4) bond length is 1.59 Å. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra and  a cornercorner with one Mn(2)O5 square pyramid. The corner-sharing octahedral tilt angles are 44°. The P(2)-O(5) bond length is 1.51 Å. The P(2)-O(6) bond length is 1.51 Å. The P(2)-O(7) bond length is 1.56 Å. The P(2)-O(8) bond length is 1.58 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) atom. The H(1)-O(4) bond length is 0.82 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(7) atom. The H(2)-O(7) bond length is 0.82 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(8) atom. The H(3)-O(8) bond length is 0.82 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one P(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Mn(2) and one P(1) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one P(1) and one H(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Mn(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one P(2) and one H(2) atom. In the eighth O site, O(8) is bonded in a water-like geometry to one P(2) and one H(3) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(1) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(1) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Mn(2) and one C(2) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(2) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Mn(2) and one C(3) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(3) atom. Linkers: 3 [O]C(=O)C([O])=O. Metal clusters: 4 [Mn]. The MOF has largest included sphere 4.75 A, density 1.49 g/cm3, surface area 3212.09 m2/g, accessible volume 0.26 cm3/g