Co4GaGe3 crystallizes in the trigonal R3 space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 7-coordinate geometry to one Ga(1) and six equivalent Ge(1) atoms. In the second Co site, Co(2) is bonded in a 7-coordinate geometry to two equivalent Ga(1) and five equivalent Ge(1) atoms. Ga(1) is bonded in a 13-coordinate geometry to one Co(1), six equivalent Co(2), and six equivalent Ge(1) atoms. Ge(1) is bonded in a 7-coordinate geometry to two equivalent Co(1), five equivalent Co(2), and two equivalent Ga(1) atoms.
Co4GaGe3 crystallizes in the trigonal R3 space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 7-coordinate geometry to one Ga(1) and six equivalent Ge(1) atoms. The Co(1)-Ga(1) bond length is 2.41 Å. There are three shorter (2.37 Å) and three longer (2.59 Å) Co(1)-Ge(1) bond lengths. In the second Co site, Co(2) is bonded in a 7-coordinate geometry to two equivalent Ga(1) and five equivalent Ge(1) atoms. There is one shorter (2.42 Å) and one longer (2.58 Å) Co(2)-Ga(1) bond length. There are a spread of Co(2)-Ge(1) bond distances ranging from 2.35-2.60 Å. Ga(1) is bonded in a 13-coordinate geometry to one Co(1), six equivalent Co(2), and six equivalent Ge(1) atoms. All Ga(1)-Ge(1) bond lengths are 2.84 Å. Ge(1) is bonded in a 7-coordinate geometry to two equivalent Co(1), five equivalent Co(2), and two equivalent Ga(1) atoms.