Cu2S is Fluorite structured and crystallizes in the cubic Fm-3m space group. Cu(1) is bonded to four equivalent S(1) atoms to form a mixture of corner and edge-sharing CuS4 tetrahedra. S(1) is bonded in a body-centered cubic geometry to eight equivalent Cu(1) atoms.
Cu2S is Fluorite structured and crystallizes in the cubic Fm-3m space group. Cu(1) is bonded to four equivalent S(1) atoms to form a mixture of corner and edge-sharing CuS4 tetrahedra. All Cu(1)-S(1) bond lengths are 2.40 Å. S(1) is bonded in a body-centered cubic geometry to eight equivalent Cu(1) atoms.