Th3Co3Sb4 crystallizes in the cubic I-43d space group. Th(1) is bonded in a 12-coordinate geometry to four equivalent Co(1) and eight equivalent Sb(1) atoms. Co(1) is bonded in a 8-coordinate geometry to four equivalent Th(1) and four equivalent Sb(1) atoms. Sb(1) is bonded in a 9-coordinate geometry to six equivalent Th(1) and three equivalent Co(1) atoms.
Th3Co3Sb4 crystallizes in the cubic I-43d space group. Th(1) is bonded in a 12-coordinate geometry to four equivalent Co(1) and eight equivalent Sb(1) atoms. All Th(1)-Co(1) bond lengths are 2.95 Å. There are four shorter (3.27 Å) and four longer (3.40 Å) Th(1)-Sb(1) bond lengths. Co(1) is bonded in a 8-coordinate geometry to four equivalent Th(1) and four equivalent Sb(1) atoms. All Co(1)-Sb(1) bond lengths are 2.67 Å. Sb(1) is bonded in a 9-coordinate geometry to six equivalent Th(1) and three equivalent Co(1) atoms.