Sc7CoI12 crystallizes in the trigonal R-3 space group. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in an octahedral geometry to six equivalent I(2) atoms. In the second Sc site, Sc(2) is bonded in a 6-coordinate geometry to one Co(1), two equivalent I(2), and three equivalent I(1) atoms. Co(1) is bonded in an octahedral geometry to six equivalent Sc(2) atoms. There are two inequivalent I sites. In the first I site, I(1) is bonded in a 3-coordinate geometry to three equivalent Sc(2) atoms. In the second I site, I(2) is bonded in a distorted T-shaped geometry to one Sc(1) and two equivalent Sc(2) atoms.
Sc7CoI12 crystallizes in the trigonal R-3 space group. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in an octahedral geometry to six equivalent I(2) atoms. All Sc(1)-I(2) bond lengths are 2.90 Å. In the second Sc site, Sc(2) is bonded in a 6-coordinate geometry to one Co(1), two equivalent I(2), and three equivalent I(1) atoms. The Sc(2)-Co(1) bond length is 2.42 Å. There is one shorter (3.04 Å) and one longer (3.06 Å) Sc(2)-I(2) bond length. There are a spread of Sc(2)-I(1) bond distances ranging from 2.94-3.46 Å. Co(1) is bonded in an octahedral geometry to six equivalent Sc(2) atoms. There are two inequivalent I sites. In the first I site, I(1) is bonded in a 3-coordinate geometry to three equivalent Sc(2) atoms. In the second I site, I(2) is bonded in a distorted T-shaped geometry to one Sc(1) and two equivalent Sc(2) atoms.