CuS is Covellite structured and crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one S(2) and three equivalent S(1) atoms to form CuS4 tetrahedra that share corners with three equivalent S(1)Cu3S tetrahedra and corners with seven equivalent Cu(1)S4 tetrahedra. In the second Cu site, Cu(2) is bonded in a trigonal planar geometry to three equivalent S(2) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Cu(1) and one S(1) atom to form distorted SCu3S tetrahedra that share corners with three equivalent Cu(1)S4 tetrahedra, corners with six equivalent S(1)Cu3S tetrahedra, and corners with three equivalent S(2)Cu5 trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent Cu(1) and three equivalent Cu(2) atoms to form SCu5 trigonal bipyramids that share corners with six equivalent S(1)Cu3S tetrahedra and corners with six equivalent S(2)Cu5 trigonal bipyramids.
CuS is Covellite structured and crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one S(2) and three equivalent S(1) atoms to form CuS4 tetrahedra that share corners with three equivalent S(1)Cu3S tetrahedra and corners with seven equivalent Cu(1)S4 tetrahedra. The Cu(1)-S(2) bond length is 2.35 Å. There are two shorter (2.28 Å) and one longer (2.29 Å) Cu(1)-S(1) bond length. In the second Cu site, Cu(2) is bonded in a trigonal planar geometry to three equivalent S(2) atoms. There is one shorter (2.17 Å) and two longer (2.18 Å) Cu(2)-S(2) bond lengths. There are two inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Cu(1) and one S(1) atom to form distorted SCu3S tetrahedra that share corners with three equivalent Cu(1)S4 tetrahedra, corners with six equivalent S(1)Cu3S tetrahedra, and corners with three equivalent S(2)Cu5 trigonal bipyramids. The S(1)-S(1) bond length is 2.09 Å. In the second S site, S(2) is bonded to two equivalent Cu(1) and three equivalent Cu(2) atoms to form SCu5 trigonal bipyramids that share corners with six equivalent S(1)Cu3S tetrahedra and corners with six equivalent S(2)Cu5 trigonal bipyramids.