ZrP2O7 crystallizes in the cubic Pa-3 space group. Zr(1) is bonded to six equivalent O(2) atoms to form ZrO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(1) and three equivalent O(2) atoms to form PO4 tetrahedra that share corners with three equivalent Zr(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 9°. There are two inequivalent O sites. In the first O site, O(2) is bonded in a linear geometry to one Zr(1) and one P(1) atom. In the second O site, O(1) is bonded in a linear geometry to two equivalent P(1) atoms.
ZrP2O7 crystallizes in the cubic Pa-3 space group. Zr(1) is bonded to six equivalent O(2) atoms to form ZrO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. All Zr(1)-O(2) bond lengths are 2.07 Å. P(1) is bonded to one O(1) and three equivalent O(2) atoms to form PO4 tetrahedra that share corners with three equivalent Zr(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 9°. The P(1)-O(1) bond length is 1.57 Å. All P(1)-O(2) bond lengths are 1.51 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a linear geometry to one Zr(1) and one P(1) atom. In the second O site, O(1) is bonded in a linear geometry to two equivalent P(1) atoms.