Zn2GeO4 crystallizes in the trigonal R-3 space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), and two equivalent O(4) atoms to form ZnO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form ZnO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with four equivalent Zn(1)O4 tetrahedra and corners with four equivalent Zn(2)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(3) is bonded in a trigonal planar geometry to two equivalent Zn(2) and one Ge(1) atom. In the second O site, O(4) is bonded in a trigonal planar geometry to two equivalent Zn(1) and one Ge(1) atom. In the third O site, O(1) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Ge(1) atom. In the fourth O site, O(2) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Ge(1) atom.
Zn2GeO4 crystallizes in the trigonal R-3 space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), and two equivalent O(4) atoms to form ZnO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. The Zn(1)-O(1) bond length is 1.94 Å. The Zn(1)-O(2) bond length is 1.94 Å. There is one shorter (1.95 Å) and one longer (1.97 Å) Zn(1)-O(4) bond length. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form ZnO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. The Zn(2)-O(1) bond length is 1.95 Å. The Zn(2)-O(2) bond length is 1.94 Å. There is one shorter (1.96 Å) and one longer (1.98 Å) Zn(2)-O(3) bond length. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with four equivalent Zn(1)O4 tetrahedra and corners with four equivalent Zn(2)O4 tetrahedra. The Ge(1)-O(1) bond length is 1.75 Å. The Ge(1)-O(2) bond length is 1.76 Å. The Ge(1)-O(3) bond length is 1.76 Å. The Ge(1)-O(4) bond length is 1.76 Å. There are four inequivalent O sites. In the first O site, O(3) is bonded in a trigonal planar geometry to two equivalent Zn(2) and one Ge(1) atom. In the second O site, O(4) is bonded in a trigonal planar geometry to two equivalent Zn(1) and one Ge(1) atom. In the third O site, O(1) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Ge(1) atom. In the fourth O site, O(2) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Ge(1) atom.