DyPH6(CO4)2 crystallizes in the monoclinic P2_1/c space group. Dy(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. The Dy(1)-O(1) bond length is 2.42 Å. The Dy(1)-O(2) bond length is 2.43 Å. The Dy(1)-O(3) bond length is 2.46 Å. The Dy(1)-O(4) bond length is 2.35 Å. The Dy(1)-O(5) bond length is 2.32 Å. The Dy(1)-O(6) bond length is 2.35 Å. The Dy(1)-O(7) bond length is 2.32 Å. The Dy(1)-O(8) bond length is 2.32 Å. There are two 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 1.25 Å. The C(1)-O(2) bond length is 1.28 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 1.27 Å. The C(2)-O(4) bond length is 1.26 Å. P(1) is bonded in a distorted tetrahedral geometry to one H(5), one H(6), one O(5), and one O(6) atom. The P(1)-H(5) bond length is 1.41 Å. The P(1)-H(6) bond length is 1.42 Å. The P(1)-O(5) bond length is 1.53 Å. The P(1)-O(6) bond length is 1.53 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) and one O(7) atom. The H(1)-O(5) bond length is 1.73 Å. The H(1)-O(7) bond length is 0.99 Å. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(2) and one O(7) atom. The H(2)-O(2) bond length is 1.66 Å. The H(2)-O(7) bond length is 1.00 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 0.99 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(8) atom. The H(4)-O(8) bond length is 0.99 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one P(1) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one P(1) atom. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a distorted water-like geometry to one Dy(1), one H(1), and one H(2) atom. In the second O site, O(8) is bonded in a distorted water-like geometry to one Dy(1), one H(3), and one H(4) atom. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Dy(1) and one C(1) atom. In the fourth O site, O(2) is bonded in a distorted trigonal planar geometry to one Dy(1), one C(1), and one H(2) atom. In the fifth O site, O(6) is bonded in a 2-coordinate geometry to one Dy(1) and one P(1) atom. In the sixth O site, O(3) is bonded in a distorted single-bond geometry to one Dy(1) and one C(2) atom. In the seventh O site, O(4) is bonded in a bent 120 degrees geometry to one Dy(1) and one C(2) atom. In the eighth O site, O(5) is bonded in a 3-coordinate geometry to one Dy(1), one P(1), and one H(1) atom. Linkers: 2 [O]C(=O)C([O])=O. Metal clusters: 4 [Dy]. The MOF has largest included sphere 1.73 A, density 3.04 g/cm3, surface area 2268.69 m2/g, accessible volume 0.07 cm3/g