GdCoGa2 crystallizes in the monoclinic Pm space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 14-coordinate geometry to four equivalent Co(2), two equivalent Ga(1), two equivalent Ga(3), two equivalent Ga(4), and four equivalent Ga(2) atoms. In the second Gd site, Gd(2) is bonded in a 14-coordinate geometry to four equivalent Co(1), two equivalent Ga(2), two equivalent Ga(3), two equivalent Ga(4), and four equivalent Ga(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 10-coordinate geometry to four equivalent Gd(2), one Co(2), one Ga(1), two equivalent Ga(3), and two equivalent Ga(4) atoms. In the second Co site, Co(2) is bonded in a 10-coordinate geometry to four equivalent Gd(1), one Co(1), one Ga(2), two equivalent Ga(3), and two equivalent Ga(4) atoms. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to two equivalent Gd(1), four equivalent Gd(2), one Co(1), and two equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to two equivalent Gd(2), four equivalent Gd(1), one Co(2), and two equivalent Ga(1) atoms. In the third Ga site, Ga(3) is bonded in a 4-coordinate geometry to two equivalent Gd(1), two equivalent Gd(2), two equivalent Co(1), two equivalent Co(2), and four equivalent Ga(4) atoms. In the fourth Ga site, Ga(4) is bonded in a 12-coordinate geometry to two equivalent Gd(1), two equivalent Gd(2), two equivalent Co(1), two equivalent Co(2), and four equivalent Ga(3) atoms.
GdCoGa2 crystallizes in the monoclinic Pm space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 14-coordinate geometry to four equivalent Co(2), two equivalent Ga(1), two equivalent Ga(3), two equivalent Ga(4), and four equivalent Ga(2) atoms. All Gd(1)-Co(2) bond lengths are 3.11 Å. Both Gd(1)-Ga(1) bond lengths are 3.31 Å. Both Gd(1)-Ga(3) bond lengths are 3.22 Å. Both Gd(1)-Ga(4) bond lengths are 3.21 Å. All Gd(1)-Ga(2) bond lengths are 3.09 Å. In the second Gd site, Gd(2) is bonded in a 14-coordinate geometry to four equivalent Co(1), two equivalent Ga(2), two equivalent Ga(3), two equivalent Ga(4), and four equivalent Ga(1) atoms. There are two shorter (3.11 Å) and two longer (3.12 Å) Gd(2)-Co(1) bond lengths. Both Gd(2)-Ga(2) bond lengths are 3.32 Å. Both Gd(2)-Ga(3) bond lengths are 3.23 Å. Both Gd(2)-Ga(4) bond lengths are 3.22 Å. All Gd(2)-Ga(1) bond lengths are 3.09 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 10-coordinate geometry to four equivalent Gd(2), one Co(2), one Ga(1), two equivalent Ga(3), and two equivalent Ga(4) atoms. The Co(1)-Co(2) bond length is 2.57 Å. The Co(1)-Ga(1) bond length is 2.37 Å. Both Co(1)-Ga(3) bond lengths are 2.40 Å. Both Co(1)-Ga(4) bond lengths are 2.41 Å. In the second Co site, Co(2) is bonded in a 10-coordinate geometry to four equivalent Gd(1), one Co(1), one Ga(2), two equivalent Ga(3), and two equivalent Ga(4) atoms. The Co(2)-Ga(2) bond length is 2.36 Å. Both Co(2)-Ga(3) bond lengths are 2.39 Å. There is one shorter (2.40 Å) and one longer (2.41 Å) Co(2)-Ga(4) bond length. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to two equivalent Gd(1), four equivalent Gd(2), one Co(1), and two equivalent Ga(2) atoms. Both Ga(1)-Ga(2) bond lengths are 2.51 Å. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to two equivalent Gd(2), four equivalent Gd(1), one Co(2), and two equivalent Ga(1) atoms. In the third Ga site, Ga(3) is bonded in a 4-coordinate geometry to two equivalent Gd(1), two equivalent Gd(2), two equivalent Co(1), two equivalent Co(2), and four equivalent Ga(4) atoms. There are two shorter (2.86 Å) and two longer (2.87 Å) Ga(3)-Ga(4) bond lengths. In the fourth Ga site, Ga(4) is bonded in a 12-coordinate geometry to two equivalent Gd(1), two equivalent Gd(2), two equivalent Co(1), two equivalent Co(2), and four equivalent Ga(3) atoms.