Ni13Ga9 crystallizes in the monoclinic C2/m space group. There are six inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 6-coordinate geometry to one Ni(4), one Ni(5), one Ni(6), two equivalent Ni(3), one Ga(2), one Ga(3), one Ga(4), and three equivalent Ga(1) atoms. In the second Ni site, Ni(2) is bonded in a 11-coordinate geometry to one Ni(3), two equivalent Ni(4), two equivalent Ni(6), one Ga(2), one Ga(4), two equivalent Ga(1), and two equivalent Ga(3) atoms. In the third Ni site, Ni(3) is bonded in a 13-coordinate geometry to one Ni(2), one Ni(5), four equivalent Ni(1), one Ga(2), one Ga(3), one Ga(4), and four equivalent Ga(1) atoms. In the fourth Ni site, Ni(4) is bonded in a 12-coordinate geometry to two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(6), two equivalent Ga(1), two equivalent Ga(2), and two equivalent Ga(3) atoms. In the fifth Ni site, Ni(5) is bonded to two equivalent Ni(3), four equivalent Ni(1), two equivalent Ga(3), and four equivalent Ga(1) atoms to form face-sharing NiGa6Ni6 cuboctahedra. In the sixth Ni site, Ni(6) is bonded to two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(4), two equivalent Ga(1), two equivalent Ga(2), and two equivalent Ga(3) atoms to form a mixture of corner and face-sharing NiGa6Ni6 cuboctahedra. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to one Ni(2), one Ni(4), one Ni(5), one Ni(6), two equivalent Ni(3), and three equivalent Ni(1) atoms. In the second Ga site, Ga(2) is bonded in a 7-coordinate geometry to one Ni(2), one Ni(3), two equivalent Ni(1), two equivalent Ni(4), and two equivalent Ni(6) atoms. In the third Ga site, Ga(3) is bonded in a 10-coordinate geometry to one Ni(3), one Ni(5), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(4), and two equivalent Ni(6) atoms. In the fourth Ga site, Ga(4) is bonded in a distorted body-centered cubic geometry to two equivalent Ni(2), two equivalent Ni(3), and four equivalent Ni(1) atoms.
Ni13Ga9 crystallizes in the monoclinic C2/m space group. There are six inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 6-coordinate geometry to one Ni(4), one Ni(5), one Ni(6), two equivalent Ni(3), one Ga(2), one Ga(3), one Ga(4), and three equivalent Ga(1) atoms. The Ni(1)-Ni(4) bond length is 2.69 Å. The Ni(1)-Ni(5) bond length is 2.58 Å. The Ni(1)-Ni(6) bond length is 2.57 Å. There is one shorter (2.57 Å) and one longer (2.64 Å) Ni(1)-Ni(3) bond length. The Ni(1)-Ga(2) bond length is 2.42 Å. The Ni(1)-Ga(3) bond length is 2.36 Å. The Ni(1)-Ga(4) bond length is 2.45 Å. There are a spread of Ni(1)-Ga(1) bond distances ranging from 2.44-2.49 Å. In the second Ni site, Ni(2) is bonded in a 11-coordinate geometry to one Ni(3), two equivalent Ni(4), two equivalent Ni(6), one Ga(2), one Ga(4), two equivalent Ga(1), and two equivalent Ga(3) atoms. The Ni(2)-Ni(3) bond length is 2.53 Å. Both Ni(2)-Ni(4) bond lengths are 2.63 Å. Both Ni(2)-Ni(6) bond lengths are 2.54 Å. The Ni(2)-Ga(2) bond length is 2.46 Å. The Ni(2)-Ga(4) bond length is 2.43 Å. Both Ni(2)-Ga(1) bond lengths are 2.44 Å. There is one shorter (2.37 Å) and one longer (2.62 Å) Ni(2)-Ga(3) bond length. In the third Ni site, Ni(3) is bonded in a 13-coordinate geometry to one Ni(2), one Ni(5), four equivalent Ni(1), one Ga(2), one Ga(3), one Ga(4), and four equivalent Ga(1) atoms. The Ni(3)-Ni(5) bond length is 2.48 Å. The Ni(3)-Ga(2) bond length is 2.92 Å. The Ni(3)-Ga(3) bond length is 2.51 Å. The Ni(3)-Ga(4) bond length is 2.44 Å. There are two shorter (2.45 Å) and two longer (2.78 Å) Ni(3)-Ga(1) bond lengths. In the fourth Ni site, Ni(4) is bonded in a 12-coordinate geometry to two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(6), two equivalent Ga(1), two equivalent Ga(2), and two equivalent Ga(3) atoms. Both Ni(4)-Ni(6) bond lengths are 2.46 Å. Both Ni(4)-Ga(1) bond lengths are 2.42 Å. Both Ni(4)-Ga(2) bond lengths are 2.45 Å. Both Ni(4)-Ga(3) bond lengths are 2.51 Å. In the fifth Ni site, Ni(5) is bonded to two equivalent Ni(3), four equivalent Ni(1), two equivalent Ga(3), and four equivalent Ga(1) atoms to form face-sharing NiGa6Ni6 cuboctahedra. Both Ni(5)-Ga(3) bond lengths are 2.60 Å. All Ni(5)-Ga(1) bond lengths are 2.48 Å. In the sixth Ni site, Ni(6) is bonded to two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(4), two equivalent Ga(1), two equivalent Ga(2), and two equivalent Ga(3) atoms to form a mixture of corner and face-sharing NiGa6Ni6 cuboctahedra. Both Ni(6)-Ga(1) bond lengths are 2.53 Å. Both Ni(6)-Ga(2) bond lengths are 2.50 Å. Both Ni(6)-Ga(3) bond lengths are 2.57 Å. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to one Ni(2), one Ni(4), one Ni(5), one Ni(6), two equivalent Ni(3), and three equivalent Ni(1) atoms. In the second Ga site, Ga(2) is bonded in a 7-coordinate geometry to one Ni(2), one Ni(3), two equivalent Ni(1), two equivalent Ni(4), and two equivalent Ni(6) atoms. In the third Ga site, Ga(3) is bonded in a 10-coordinate geometry to one Ni(3), one Ni(5), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(4), and two equivalent Ni(6) atoms. In the fourth Ga site, Ga(4) is bonded in a distorted body-centered cubic geometry to two equivalent Ni(2), two equivalent Ni(3), and four equivalent Ni(1) atoms.