Ni3P4(WO7)4 crystallizes in the tetragonal I4_1/a space group. W(1) is bonded to one O(1), one O(3), one O(4), one O(6), and two equivalent O(2) atoms to form distorted WO6 octahedra that share corners with two equivalent W(1)O6 octahedra, corners with two equivalent Ni(2)O6 octahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-43°. The W(1)-O(1) bond length is 1.78 Å. The W(1)-O(3) bond length is 1.76 Å. The W(1)-O(4) bond length is 2.07 Å. The W(1)-O(6) bond length is 2.10 Å. There is one shorter (1.82 Å) and one longer (2.15 Å) W(1)-O(2) bond length. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to four equivalent O(7) atoms to form NiO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra. All Ni(1)-O(7) bond lengths are 1.92 Å. In the second Ni site, Ni(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form NiO6 octahedra that share corners with four equivalent W(1)O6 octahedra and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-42°. Both Ni(2)-O(1) bond lengths are 2.07 Å. Both Ni(2)-O(3) bond lengths are 2.07 Å. Both Ni(2)-O(5) bond lengths are 2.10 Å. P(1) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Ni(2)O6 octahedra, corners with two equivalent W(1)O6 octahedra, and  a cornercorner with one Ni(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-56°. The P(1)-O(4) bond length is 1.56 Å. The P(1)-O(5) bond length is 1.52 Å. The P(1)-O(6) bond length is 1.56 Å. The P(1)-O(7) bond length is 1.52 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one W(1) and one Ni(2) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent W(1) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one W(1) and one Ni(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one W(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ni(2) and one P(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one W(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Ni(1) and one P(1) atom. Linkers: 16 [O]P([O])([O])=O. Metal clusters: 12 [Ni] ,16 [W]. The MOF has largest included sphere 3.97 A, density 3.15 g/cm3, surface area 1494.97 m2/g, accessible volume 0.15 cm3/g