CeCu4Ga crystallizes in the orthorhombic Cmmm space group. Ce(1) is bonded in a distorted hexagonal planar geometry to six equivalent Cu(1), eight equivalent Cu(2), and four equivalent Ga(1) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Ce(1), four equivalent Cu(2), and two equivalent Ga(1) atoms. In the second Cu site, Cu(2) is bonded to four equivalent Ce(1), two equivalent Cu(2), four equivalent Cu(1), and two equivalent Ga(1) atoms to form CuCe4Ga2Cu6 cuboctahedra that share corners with four equivalent Ga(1)Ce4Cu8 cuboctahedra, corners with twelve equivalent Cu(2)Ce4Ga2Cu6 cuboctahedra, edges with four equivalent Ga(1)Ce4Cu8 cuboctahedra, edges with six equivalent Cu(2)Ce4Ga2Cu6 cuboctahedra, faces with four equivalent Ga(1)Ce4Cu8 cuboctahedra, and faces with six equivalent Cu(2)Ce4Ga2Cu6 cuboctahedra. Ga(1) is bonded to four equivalent Ce(1), four equivalent Cu(1), and four equivalent Cu(2) atoms to form GaCe4Cu8 cuboctahedra that share corners with eight equivalent Cu(2)Ce4Ga2Cu6 cuboctahedra, corners with eight equivalent Ga(1)Ce4Cu8 cuboctahedra, edges with two equivalent Ga(1)Ce4Cu8 cuboctahedra, edges with eight equivalent Cu(2)Ce4Ga2Cu6 cuboctahedra, faces with two equivalent Ga(1)Ce4Cu8 cuboctahedra, and faces with eight equivalent Cu(2)Ce4Ga2Cu6 cuboctahedra.
CeCu4Ga crystallizes in the orthorhombic Cmmm space group. Ce(1) is bonded in a distorted hexagonal planar geometry to six equivalent Cu(1), eight equivalent Cu(2), and four equivalent Ga(1) atoms. There are two shorter (2.92 Å) and four longer (2.97 Å) Ce(1)-Cu(1) bond lengths. All Ce(1)-Cu(2) bond lengths are 3.29 Å. All Ce(1)-Ga(1) bond lengths are 3.29 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Ce(1), four equivalent Cu(2), and two equivalent Ga(1) atoms. All Cu(1)-Cu(2) bond lengths are 2.54 Å. Both Cu(1)-Ga(1) bond lengths are 2.56 Å. In the second Cu site, Cu(2) is bonded to four equivalent Ce(1), two equivalent Cu(2), four equivalent Cu(1), and two equivalent Ga(1) atoms to form CuCe4Ga2Cu6 cuboctahedra that share corners with four equivalent Ga(1)Ce4Cu8 cuboctahedra, corners with twelve equivalent Cu(2)Ce4Ga2Cu6 cuboctahedra, edges with four equivalent Ga(1)Ce4Cu8 cuboctahedra, edges with six equivalent Cu(2)Ce4Ga2Cu6 cuboctahedra, faces with four equivalent Ga(1)Ce4Cu8 cuboctahedra, and faces with six equivalent Cu(2)Ce4Ga2Cu6 cuboctahedra. Both Cu(2)-Cu(2) bond lengths are 2.56 Å. Both Cu(2)-Ga(1) bond lengths are 2.56 Å. Ga(1) is bonded to four equivalent Ce(1), four equivalent Cu(1), and four equivalent Cu(2) atoms to form GaCe4Cu8 cuboctahedra that share corners with eight equivalent Cu(2)Ce4Ga2Cu6 cuboctahedra, corners with eight equivalent Ga(1)Ce4Cu8 cuboctahedra, edges with two equivalent Ga(1)Ce4Cu8 cuboctahedra, edges with eight equivalent Cu(2)Ce4Ga2Cu6 cuboctahedra, faces with two equivalent Ga(1)Ce4Cu8 cuboctahedra, and faces with eight equivalent Cu(2)Ce4Ga2Cu6 cuboctahedra.