Ce2Au3Ga5 crystallizes in the tetragonal P-4m2 space group. Ce(1) is bonded in a 16-coordinate geometry to two equivalent Au(2), four equivalent Au(1), two equivalent Ga(1), two equivalent Ga(2), two equivalent Ga(4), and four equivalent Ga(3) atoms. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a 9-coordinate geometry to four equivalent Ce(1), two equivalent Au(2), one Ga(3), and two equivalent Ga(4) atoms. In the second Au site, Au(2) is bonded to four equivalent Ce(1), four equivalent Au(1), and four equivalent Ga(4) atoms to form AuCe4Ga4Au4 cuboctahedra that share corners with four equivalent Au(2)Ce4Ga4Au4 cuboctahedra, corners with four equivalent Ga(2)Ce4Ga8 cuboctahedra, corners with eight equivalent Ga(1)Ce4Ga8 cuboctahedra, edges with two equivalent Ga(2)Ce4Ga8 cuboctahedra, and faces with four equivalent Au(2)Ce4Ga4Au4 cuboctahedra. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to four equivalent Ce(1), four equivalent Ga(2), and four equivalent Ga(3) atoms to form distorted GaCe4Ga8 cuboctahedra that share corners with four equivalent Ga(1)Ce4Ga8 cuboctahedra, corners with eight equivalent Au(2)Ce4Ga4Au4 cuboctahedra, faces with four equivalent Ga(1)Ce4Ga8 cuboctahedra, and faces with four equivalent Ga(2)Ce4Ga8 cuboctahedra. In the second Ga site, Ga(2) is bonded to four equivalent Ce(1), four equivalent Ga(1), and four equivalent Ga(3) atoms to form distorted GaCe4Ga8 cuboctahedra that share corners with four equivalent Au(2)Ce4Ga4Au4 cuboctahedra, corners with four equivalent Ga(2)Ce4Ga8 cuboctahedra, edges with two equivalent Au(2)Ce4Ga4Au4 cuboctahedra, faces with four equivalent Ga(1)Ce4Ga8 cuboctahedra, and faces with four equivalent Ga(2)Ce4Ga8 cuboctahedra. In the third Ga site, Ga(3) is bonded in a distorted single-bond geometry to four equivalent Ce(1), one Au(1), two equivalent Ga(1), and two equivalent Ga(2) atoms. In the fourth Ga site, Ga(4) is bonded in a 12-coordinate geometry to four equivalent Ce(1), four equivalent Au(1), and four equivalent Au(2) atoms.
Ce2Au3Ga5 crystallizes in the tetragonal P-4m2 space group. Ce(1) is bonded in a 16-coordinate geometry to two equivalent Au(2), four equivalent Au(1), two equivalent Ga(1), two equivalent Ga(2), two equivalent Ga(4), and four equivalent Ga(3) atoms. Both Ce(1)-Au(2) bond lengths are 3.49 Å. All Ce(1)-Au(1) bond lengths are 3.27 Å. Both Ce(1)-Ga(1) bond lengths are 3.52 Å. Both Ce(1)-Ga(2) bond lengths are 3.52 Å. Both Ce(1)-Ga(4) bond lengths are 3.49 Å. All Ce(1)-Ga(3) bond lengths are 3.36 Å. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a 9-coordinate geometry to four equivalent Ce(1), two equivalent Au(2), one Ga(3), and two equivalent Ga(4) atoms. Both Au(1)-Au(2) bond lengths are 2.71 Å. The Au(1)-Ga(3) bond length is 2.46 Å. Both Au(1)-Ga(4) bond lengths are 2.71 Å. In the second Au site, Au(2) is bonded to four equivalent Ce(1), four equivalent Au(1), and four equivalent Ga(4) atoms to form AuCe4Ga4Au4 cuboctahedra that share corners with four equivalent Au(2)Ce4Ga4Au4 cuboctahedra, corners with four equivalent Ga(2)Ce4Ga8 cuboctahedra, corners with eight equivalent Ga(1)Ce4Ga8 cuboctahedra, edges with two equivalent Ga(2)Ce4Ga8 cuboctahedra, and faces with four equivalent Au(2)Ce4Ga4Au4 cuboctahedra. All Au(2)-Ga(4) bond lengths are 3.08 Å. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to four equivalent Ce(1), four equivalent Ga(2), and four equivalent Ga(3) atoms to form distorted GaCe4Ga8 cuboctahedra that share corners with four equivalent Ga(1)Ce4Ga8 cuboctahedra, corners with eight equivalent Au(2)Ce4Ga4Au4 cuboctahedra, faces with four equivalent Ga(1)Ce4Ga8 cuboctahedra, and faces with four equivalent Ga(2)Ce4Ga8 cuboctahedra. All Ga(1)-Ga(2) bond lengths are 3.08 Å. All Ga(1)-Ga(3) bond lengths are 2.60 Å. In the second Ga site, Ga(2) is bonded to four equivalent Ce(1), four equivalent Ga(1), and four equivalent Ga(3) atoms to form distorted GaCe4Ga8 cuboctahedra that share corners with four equivalent Au(2)Ce4Ga4Au4 cuboctahedra, corners with four equivalent Ga(2)Ce4Ga8 cuboctahedra, edges with two equivalent Au(2)Ce4Ga4Au4 cuboctahedra, faces with four equivalent Ga(1)Ce4Ga8 cuboctahedra, and faces with four equivalent Ga(2)Ce4Ga8 cuboctahedra. All Ga(2)-Ga(3) bond lengths are 2.60 Å. In the third Ga site, Ga(3) is bonded in a distorted single-bond geometry to four equivalent Ce(1), one Au(1), two equivalent Ga(1), and two equivalent Ga(2) atoms. In the fourth Ga site, Ga(4) is bonded in a 12-coordinate geometry to four equivalent Ce(1), four equivalent Au(1), and four equivalent Au(2) atoms.