ZnCdO2 is Enargite-like structured and crystallizes in the trigonal P3m1 space group. Cd(1) is bonded to one O(1) and three equivalent O(2) atoms to form CdO4 tetrahedra that share corners with six equivalent Cd(1)O4 tetrahedra and corners with six equivalent Zn(1)O4 tetrahedra. Zn(1) is bonded to one O(2) and three equivalent O(1) atoms to form ZnO4 tetrahedra that share corners with six equivalent Cd(1)O4 tetrahedra and corners with six equivalent Zn(1)O4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Cd(1) and three equivalent Zn(1) atoms to form OZn3Cd tetrahedra that share corners with six equivalent O(1)Zn3Cd tetrahedra and corners with six equivalent O(2)ZnCd3 tetrahedra. In the second O site, O(2) is bonded to three equivalent Cd(1) and one Zn(1) atom to form OZnCd3 tetrahedra that share corners with six equivalent O(1)Zn3Cd tetrahedra and corners with six equivalent O(2)ZnCd3 tetrahedra.
ZnCdO2 is Enargite-like structured and crystallizes in the trigonal P3m1 space group. Cd(1) is bonded to one O(1) and three equivalent O(2) atoms to form CdO4 tetrahedra that share corners with six equivalent Cd(1)O4 tetrahedra and corners with six equivalent Zn(1)O4 tetrahedra. The Cd(1)-O(1) bond length is 2.24 Å. All Cd(1)-O(2) bond lengths are 2.19 Å. Zn(1) is bonded to one O(2) and three equivalent O(1) atoms to form ZnO4 tetrahedra that share corners with six equivalent Cd(1)O4 tetrahedra and corners with six equivalent Zn(1)O4 tetrahedra. The Zn(1)-O(2) bond length is 1.98 Å. All Zn(1)-O(1) bond lengths are 2.07 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Cd(1) and three equivalent Zn(1) atoms to form OZn3Cd tetrahedra that share corners with six equivalent O(1)Zn3Cd tetrahedra and corners with six equivalent O(2)ZnCd3 tetrahedra. In the second O site, O(2) is bonded to three equivalent Cd(1) and one Zn(1) atom to form OZnCd3 tetrahedra that share corners with six equivalent O(1)Zn3Cd tetrahedra and corners with six equivalent O(2)ZnCd3 tetrahedra.