MnCdS2 is Enargite-like structured and crystallizes in the trigonal R3m space group. Mn(1) is bonded to one S(2) and three equivalent S(1) atoms to form MnS4 tetrahedra that share corners with six equivalent Mn(1)S4 tetrahedra and corners with six equivalent Cd(1)S4 tetrahedra. Cd(1) is bonded to one S(1) and three equivalent S(2) atoms to form CdS4 tetrahedra that share corners with six equivalent Mn(1)S4 tetrahedra and corners with six equivalent Cd(1)S4 tetrahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Mn(1) and one Cd(1) atom to form SMn3Cd tetrahedra that share corners with six equivalent S(1)Mn3Cd tetrahedra and corners with six equivalent S(2)MnCd3 tetrahedra. In the second S site, S(2) is bonded to one Mn(1) and three equivalent Cd(1) atoms to form SMnCd3 tetrahedra that share corners with six equivalent S(1)Mn3Cd tetrahedra and corners with six equivalent S(2)MnCd3 tetrahedra.
MnCdS2 is Enargite-like structured and crystallizes in the trigonal R3m space group. Mn(1) is bonded to one S(2) and three equivalent S(1) atoms to form MnS4 tetrahedra that share corners with six equivalent Mn(1)S4 tetrahedra and corners with six equivalent Cd(1)S4 tetrahedra. The Mn(1)-S(2) bond length is 2.40 Å. All Mn(1)-S(1) bond lengths are 2.47 Å. Cd(1) is bonded to one S(1) and three equivalent S(2) atoms to form CdS4 tetrahedra that share corners with six equivalent Mn(1)S4 tetrahedra and corners with six equivalent Cd(1)S4 tetrahedra. The Cd(1)-S(1) bond length is 2.57 Å. All Cd(1)-S(2) bond lengths are 2.55 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Mn(1) and one Cd(1) atom to form SMn3Cd tetrahedra that share corners with six equivalent S(1)Mn3Cd tetrahedra and corners with six equivalent S(2)MnCd3 tetrahedra. In the second S site, S(2) is bonded to one Mn(1) and three equivalent Cd(1) atoms to form SMnCd3 tetrahedra that share corners with six equivalent S(1)Mn3Cd tetrahedra and corners with six equivalent S(2)MnCd3 tetrahedra.