Co4ZnGa11 crystallizes in the monoclinic P2/m space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 8-coordinate geometry to one Ga(3), one Ga(5), two equivalent Ga(1), and four equivalent Ga(2) atoms. In the second Co site, Co(2) is bonded in a 8-coordinate geometry to one Zn(1), one Ga(4), two equivalent Ga(2), and four equivalent Ga(1) atoms. Zn(1) is bonded in a 10-coordinate geometry to two equivalent Co(2), four equivalent Ga(1), and four equivalent Ga(2) atoms. There are five inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 4-coordinate geometry to one Co(1), two equivalent Co(2), and one Zn(1) atom. In the second Ga site, Ga(2) is bonded in a 8-coordinate geometry to one Co(2), two equivalent Co(1), one Zn(1), one Ga(2), one Ga(3), one Ga(4), and one Ga(5) atom. In the third Ga site, Ga(3) is bonded in a distorted linear geometry to two equivalent Co(1) and four equivalent Ga(2) atoms. In the fourth Ga site, Ga(4) is bonded in a distorted linear geometry to two equivalent Co(2) and four equivalent Ga(2) atoms. In the fifth Ga site, Ga(5) is bonded in a distorted linear geometry to two equivalent Co(1) and four equivalent Ga(2) atoms.
Co4ZnGa11 crystallizes in the monoclinic P2/m space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 8-coordinate geometry to one Ga(3), one Ga(5), two equivalent Ga(1), and four equivalent Ga(2) atoms. The Co(1)-Ga(3) bond length is 2.35 Å. The Co(1)-Ga(5) bond length is 2.34 Å. Both Co(1)-Ga(1) bond lengths are 2.35 Å. There are two shorter (2.46 Å) and two longer (2.47 Å) Co(1)-Ga(2) bond lengths. In the second Co site, Co(2) is bonded in a 8-coordinate geometry to one Zn(1), one Ga(4), two equivalent Ga(2), and four equivalent Ga(1) atoms. The Co(2)-Zn(1) bond length is 2.41 Å. The Co(2)-Ga(4) bond length is 2.30 Å. Both Co(2)-Ga(2) bond lengths are 2.35 Å. There are two shorter (2.42 Å) and two longer (2.43 Å) Co(2)-Ga(1) bond lengths. Zn(1) is bonded in a 10-coordinate geometry to two equivalent Co(2), four equivalent Ga(1), and four equivalent Ga(2) atoms. All Zn(1)-Ga(1) bond lengths are 2.75 Å. All Zn(1)-Ga(2) bond lengths are 2.83 Å. There are five inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 4-coordinate geometry to one Co(1), two equivalent Co(2), and one Zn(1) atom. In the second Ga site, Ga(2) is bonded in a 8-coordinate geometry to one Co(2), two equivalent Co(1), one Zn(1), one Ga(2), one Ga(3), one Ga(4), and one Ga(5) atom. The Ga(2)-Ga(2) bond length is 2.66 Å. The Ga(2)-Ga(3) bond length is 2.85 Å. The Ga(2)-Ga(4) bond length is 2.88 Å. The Ga(2)-Ga(5) bond length is 2.80 Å. In the third Ga site, Ga(3) is bonded in a distorted linear geometry to two equivalent Co(1) and four equivalent Ga(2) atoms. In the fourth Ga site, Ga(4) is bonded in a distorted linear geometry to two equivalent Co(2) and four equivalent Ga(2) atoms. In the fifth Ga site, Ga(5) is bonded in a distorted linear geometry to two equivalent Co(1) and four equivalent Ga(2) atoms.