Lu3Rh3Ga8 crystallizes in the orthorhombic Immm space group. There are two inequivalent Lu sites. In the first Lu site, Lu(1) is bonded to four equivalent Ga(1) and eight equivalent Ga(2) atoms to form distorted face-sharing LuGa12 cuboctahedra. In the second Lu site, Lu(2) is bonded in a 12-coordinate geometry to two equivalent Rh(1), two equivalent Rh(2), four equivalent Ga(1), and four equivalent Ga(2) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 8-coordinate geometry to four equivalent Lu(2) and four equivalent Ga(1) atoms. In the second Rh site, Rh(2) is bonded in a 8-coordinate geometry to two equivalent Lu(2), two equivalent Ga(2), and four equivalent Ga(1) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to one Lu(1), two equivalent Lu(2), one Rh(1), two equivalent Rh(2), and three equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to two equivalent Lu(1), two equivalent Lu(2), one Rh(2), one Ga(2), and three equivalent Ga(1) atoms.
Lu3Rh3Ga8 crystallizes in the orthorhombic Immm space group. There are two inequivalent Lu sites. In the first Lu site, Lu(1) is bonded to four equivalent Ga(1) and eight equivalent Ga(2) atoms to form distorted face-sharing LuGa12 cuboctahedra. All Lu(1)-Ga(1) bond lengths are 3.23 Å. All Lu(1)-Ga(2) bond lengths are 3.12 Å. In the second Lu site, Lu(2) is bonded in a 12-coordinate geometry to two equivalent Rh(1), two equivalent Rh(2), four equivalent Ga(1), and four equivalent Ga(2) atoms. Both Lu(2)-Rh(1) bond lengths are 2.98 Å. Both Lu(2)-Rh(2) bond lengths are 2.94 Å. All Lu(2)-Ga(1) bond lengths are 3.03 Å. All Lu(2)-Ga(2) bond lengths are 3.15 Å. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 8-coordinate geometry to four equivalent Lu(2) and four equivalent Ga(1) atoms. All Rh(1)-Ga(1) bond lengths are 2.60 Å. In the second Rh site, Rh(2) is bonded in a 8-coordinate geometry to two equivalent Lu(2), two equivalent Ga(2), and four equivalent Ga(1) atoms. Both Rh(2)-Ga(2) bond lengths are 2.55 Å. All Rh(2)-Ga(1) bond lengths are 2.60 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to one Lu(1), two equivalent Lu(2), one Rh(1), two equivalent Rh(2), and three equivalent Ga(2) atoms. There are two shorter (2.66 Å) and one longer (2.70 Å) Ga(1)-Ga(2) bond length. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to two equivalent Lu(1), two equivalent Lu(2), one Rh(2), one Ga(2), and three equivalent Ga(1) atoms. The Ga(2)-Ga(2) bond length is 2.52 Å.