CuZn(GeO3)2 crystallizes in the monoclinic P2_1/c space group. Cu(1) is bonded to one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form distorted CuO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with three equivalent Ge(2)O4 tetrahedra, and edges with two equivalent Cu(1)O6 octahedra. Zn(1) is bonded in a 4-coordinate geometry to one O(3), one O(4), one O(5), and one O(6) atom. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(4), one O(5), and two equivalent O(2) atoms to form GeO4 tetrahedra that share corners with three equivalent Cu(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-66°. In the second Ge site, Ge(2) is bonded to one O(3), one O(6), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with three equivalent Cu(1)O6 octahedra and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-62°. There are six inequivalent O sites. In the first O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Cu(1), one Zn(1), and one Ge(1) atom. In the second O site, O(6) is bonded to two equivalent Cu(1), one Zn(1), and one Ge(2) atom to form distorted corner-sharing OZnCu2Ge tetrahedra. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Ge(2) atoms. In the fourth O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Ge(1) atoms. In the fifth O site, O(3) is bonded in a distorted T-shaped geometry to one Cu(1), one Zn(1), and one Ge(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cu(1), one Zn(1), and one Ge(1) atom.
CuZn(GeO3)2 crystallizes in the monoclinic P2_1/c space group. Cu(1) is bonded to one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form distorted CuO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with three equivalent Ge(2)O4 tetrahedra, and edges with two equivalent Cu(1)O6 octahedra. The Cu(1)-O(3) bond length is 2.23 Å. The Cu(1)-O(4) bond length is 2.09 Å. There is one shorter (1.96 Å) and one longer (2.44 Å) Cu(1)-O(5) bond length. There is one shorter (1.95 Å) and one longer (2.27 Å) Cu(1)-O(6) bond length. Zn(1) is bonded in a 4-coordinate geometry to one O(3), one O(4), one O(5), and one O(6) atom. The Zn(1)-O(3) bond length is 1.99 Å. The Zn(1)-O(4) bond length is 1.97 Å. The Zn(1)-O(5) bond length is 2.07 Å. The Zn(1)-O(6) bond length is 2.16 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(4), one O(5), and two equivalent O(2) atoms to form GeO4 tetrahedra that share corners with three equivalent Cu(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-66°. The Ge(1)-O(4) bond length is 1.75 Å. The Ge(1)-O(5) bond length is 1.78 Å. There is one shorter (1.80 Å) and one longer (1.81 Å) Ge(1)-O(2) bond length. In the second Ge site, Ge(2) is bonded to one O(3), one O(6), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with three equivalent Cu(1)O6 octahedra and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-62°. The Ge(2)-O(3) bond length is 1.75 Å. The Ge(2)-O(6) bond length is 1.79 Å. There is one shorter (1.77 Å) and one longer (1.78 Å) Ge(2)-O(1) bond length. There are six inequivalent O sites. In the first O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Cu(1), one Zn(1), and one Ge(1) atom. In the second O site, O(6) is bonded to two equivalent Cu(1), one Zn(1), and one Ge(2) atom to form distorted corner-sharing OZnCu2Ge tetrahedra. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Ge(2) atoms. In the fourth O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Ge(1) atoms. In the fifth O site, O(3) is bonded in a distorted T-shaped geometry to one Cu(1), one Zn(1), and one Ge(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cu(1), one Zn(1), and one Ge(1) atom.