Mo2ZnO7 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form MoO4 tetrahedra that share  a cornercorner with one Mo(2)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. In the second Mo site, Mo(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form MoO4 tetrahedra that share  a cornercorner with one Mo(1)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. 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 Mo(1)O4 tetrahedra and corners with two equivalent Mo(2)O4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Mo(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Mo(1) and one Zn(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Mo(2) and one Zn(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Mo(1) and one Zn(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Mo(2) and one Zn(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Mo(1) and one Mo(2) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one Mo(1) atom.
Mo2ZnO7 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form MoO4 tetrahedra that share  a cornercorner with one Mo(2)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. The Mo(1)-O(2) bond length is 1.79 Å. The Mo(1)-O(4) bond length is 1.80 Å. The Mo(1)-O(6) bond length is 1.93 Å. The Mo(1)-O(7) bond length is 1.72 Å. In the second Mo site, Mo(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form MoO4 tetrahedra that share  a cornercorner with one Mo(1)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. The Mo(2)-O(1) bond length is 1.72 Å. The Mo(2)-O(3) bond length is 1.80 Å. The Mo(2)-O(5) bond length is 1.80 Å. The Mo(2)-O(6) bond length is 1.92 Å. 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 Mo(1)O4 tetrahedra and corners with two equivalent Mo(2)O4 tetrahedra. The Zn(1)-O(2) bond length is 1.96 Å. The Zn(1)-O(3) bond length is 1.95 Å. The Zn(1)-O(4) bond length is 1.98 Å. The Zn(1)-O(5) bond length is 1.98 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Mo(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Mo(1) and one Zn(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Mo(2) and one Zn(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Mo(1) and one Zn(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Mo(2) and one Zn(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Mo(1) and one Mo(2) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one Mo(1) atom.