ZnTe2O7 crystallizes in the monoclinic P2_1 space group. Zn(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form ZnO4 tetrahedra that share corners with two equivalent Te(1)O4 tetrahedra and corners with two equivalent Te(2)O4 tetrahedra. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form TeO4 tetrahedra that share  a cornercorner with one Te(2)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. In the second Te site, Te(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form TeO4 tetrahedra that share  a cornercorner with one Te(1)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Te(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one Te(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one Te(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one Te(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Zn(1) and one Te(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Te(1) and one Te(2) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one Te(1) atom.
ZnTe2O7 crystallizes in the monoclinic P2_1 space group. Zn(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form ZnO4 tetrahedra that share corners with two equivalent Te(1)O4 tetrahedra and corners with two equivalent Te(2)O4 tetrahedra. The Zn(1)-O(2) bond length is 2.00 Å. The Zn(1)-O(3) bond length is 1.98 Å. The Zn(1)-O(4) bond length is 2.00 Å. The Zn(1)-O(5) bond length is 1.97 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form TeO4 tetrahedra that share  a cornercorner with one Te(2)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. The Te(1)-O(2) bond length is 1.84 Å. The Te(1)-O(4) bond length is 1.85 Å. The Te(1)-O(6) bond length is 1.97 Å. The Te(1)-O(7) bond length is 1.80 Å. In the second Te site, Te(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form TeO4 tetrahedra that share  a cornercorner with one Te(1)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. The Te(2)-O(1) bond length is 1.80 Å. The Te(2)-O(3) bond length is 1.84 Å. The Te(2)-O(5) bond length is 1.85 Å. The Te(2)-O(6) bond length is 1.97 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Te(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one Te(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one Te(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one Te(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Zn(1) and one Te(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Te(1) and one Te(2) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one Te(1) atom.