Sc7CoCl12 is trigonal omega-derived structured and crystallizes in the trigonal R-3 space group. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded to one Co(1), two equivalent Cl(1), and three equivalent Cl(2) atoms to form ScCoCl5 octahedra that share corners with three equivalent Sc(1)CoCl5 octahedra,  an edgeedge with one Sc(2)Cl6 octahedra, and edges with five equivalent Sc(1)CoCl5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the second Sc site, Sc(2) is bonded to six equivalent Cl(1) atoms to form edge-sharing ScCl6 octahedra. Co(1) is bonded in an octahedral geometry to six equivalent Sc(1) atoms. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted T-shaped geometry to one Sc(2) and two equivalent Sc(1) atoms. In the second Cl site, Cl(2) is bonded in a T-shaped geometry to three equivalent Sc(1) atoms.
Sc7CoCl12 is trigonal omega-derived structured and crystallizes in the trigonal R-3 space group. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded to one Co(1), two equivalent Cl(1), and three equivalent Cl(2) atoms to form ScCoCl5 octahedra that share corners with three equivalent Sc(1)CoCl5 octahedra,  an edgeedge with one Sc(2)Cl6 octahedra, and edges with five equivalent Sc(1)CoCl5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. The Sc(1)-Co(1) bond length is 2.38 Å. There is one shorter (2.66 Å) and one longer (2.70 Å) Sc(1)-Cl(1) bond length. There are a spread of Sc(1)-Cl(2) bond distances ranging from 2.58-2.76 Å. In the second Sc site, Sc(2) is bonded to six equivalent Cl(1) atoms to form edge-sharing ScCl6 octahedra. All Sc(2)-Cl(1) bond lengths are 2.51 Å. Co(1) is bonded in an octahedral geometry to six equivalent Sc(1) atoms. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted T-shaped geometry to one Sc(2) and two equivalent Sc(1) atoms. In the second Cl site, Cl(2) is bonded in a T-shaped geometry to three equivalent Sc(1) atoms.