NpCo3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Np(1) is bonded to twelve equivalent Co(1) atoms to form NpCo12 cuboctahedra that share corners with twelve equivalent Np(1)Co12 cuboctahedra, edges with twenty-four equivalent Co(1)Np4Co8 cuboctahedra, faces with six equivalent Np(1)Co12 cuboctahedra, and faces with twelve equivalent Co(1)Np4Co8 cuboctahedra. Co(1) is bonded to four equivalent Np(1) and eight equivalent Co(1) atoms to form distorted CoNp4Co8 cuboctahedra that share corners with twelve equivalent Co(1)Np4Co8 cuboctahedra, edges with eight equivalent Np(1)Co12 cuboctahedra, edges with sixteen equivalent Co(1)Np4Co8 cuboctahedra, faces with four equivalent Np(1)Co12 cuboctahedra, and faces with fourteen equivalent Co(1)Np4Co8 cuboctahedra.
NpCo3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Np(1) is bonded to twelve equivalent Co(1) atoms to form NpCo12 cuboctahedra that share corners with twelve equivalent Np(1)Co12 cuboctahedra, edges with twenty-four equivalent Co(1)Np4Co8 cuboctahedra, faces with six equivalent Np(1)Co12 cuboctahedra, and faces with twelve equivalent Co(1)Np4Co8 cuboctahedra. All Np(1)-Co(1) bond lengths are 2.66 Å. Co(1) is bonded to four equivalent Np(1) and eight equivalent Co(1) atoms to form distorted CoNp4Co8 cuboctahedra that share corners with twelve equivalent Co(1)Np4Co8 cuboctahedra, edges with eight equivalent Np(1)Co12 cuboctahedra, edges with sixteen equivalent Co(1)Np4Co8 cuboctahedra, faces with four equivalent Np(1)Co12 cuboctahedra, and faces with fourteen equivalent Co(1)Np4Co8 cuboctahedra. All Co(1)-Co(1) bond lengths are 2.66 Å.