CoZn(GeO3)2 crystallizes in the monoclinic P2_1/c space group. Co(1) is bonded to one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form CoO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with three equivalent Ge(2)O4 tetrahedra, and edges with two equivalent Co(1)O6 octahedra. Zn(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), 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 Co(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-61°. 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 Co(1)O6 octahedra and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 33-59°. There are six inequivalent O sites. In the first O site, O(5) is bonded to two equivalent Co(1), one Zn(1), and one Ge(1) atom to form distorted corner-sharing OZnCo2Ge trigonal pyramids. In the second O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Co(1), one Zn(1), and one Ge(2) atom. In the third O site, O(1) is bonded in a 3-coordinate geometry to one Zn(1) and two equivalent Ge(2) atoms. In the fourth O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and two equivalent Ge(1) atoms. In the fifth O site, O(3) is bonded in a distorted T-shaped geometry to one Co(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 Co(1), one Zn(1), and one Ge(1) atom.
CoZn(GeO3)2 crystallizes in the monoclinic P2_1/c space group. Co(1) is bonded to one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form CoO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with three equivalent Ge(2)O4 tetrahedra, and edges with two equivalent Co(1)O6 octahedra. The Co(1)-O(3) bond length is 2.09 Å. The Co(1)-O(4) bond length is 2.11 Å. There is one shorter (2.12 Å) and one longer (2.21 Å) Co(1)-O(5) bond length. There is one shorter (2.07 Å) and one longer (2.25 Å) Co(1)-O(6) bond length. Zn(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The Zn(1)-O(1) bond length is 2.39 Å. The Zn(1)-O(2) bond length is 2.60 Å. The Zn(1)-O(3) bond length is 2.03 Å. The Zn(1)-O(4) bond length is 1.99 Å. The Zn(1)-O(5) bond length is 2.09 Å. The Zn(1)-O(6) bond length is 2.13 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 Co(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-61°. The Ge(1)-O(4) bond length is 1.74 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 Co(1)O6 octahedra and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 33-59°. The Ge(2)-O(3) bond length is 1.74 Å. The Ge(2)-O(6) bond length is 1.76 Å. There is one shorter (1.78 Å) and one longer (1.79 Å) Ge(2)-O(1) bond length. There are six inequivalent O sites. In the first O site, O(5) is bonded to two equivalent Co(1), one Zn(1), and one Ge(1) atom to form distorted corner-sharing OZnCo2Ge trigonal pyramids. In the second O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Co(1), one Zn(1), and one Ge(2) atom. In the third O site, O(1) is bonded in a 3-coordinate geometry to one Zn(1) and two equivalent Ge(2) atoms. In the fourth O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and two equivalent Ge(1) atoms. In the fifth O site, O(3) is bonded in a distorted T-shaped geometry to one Co(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 Co(1), one Zn(1), and one Ge(1) atom.