EuAg4Ga crystallizes in the orthorhombic Cmmm space group. Eu(1) is bonded in a 18-coordinate geometry to six equivalent Ag(1), eight equivalent Ag(2), and four equivalent Ga(1) atoms. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 12-coordinate geometry to three equivalent Eu(1), three equivalent Ag(1), four equivalent Ag(2), and two equivalent Ga(1) atoms. In the second Ag site, Ag(2) is bonded to four equivalent Eu(1), two equivalent Ag(2), four equivalent Ag(1), and two equivalent Ga(1) atoms to form AgEu4Ga2Ag6 cuboctahedra that share corners with four equivalent Ga(1)Eu4Ag8 cuboctahedra, corners with twelve equivalent Ag(2)Eu4Ga2Ag6 cuboctahedra, edges with four equivalent Ga(1)Eu4Ag8 cuboctahedra, edges with six equivalent Ag(2)Eu4Ga2Ag6 cuboctahedra, faces with four equivalent Ga(1)Eu4Ag8 cuboctahedra, and faces with six equivalent Ag(2)Eu4Ga2Ag6 cuboctahedra. Ga(1) is bonded to four equivalent Eu(1), four equivalent Ag(1), and four equivalent Ag(2) atoms to form distorted GaEu4Ag8 cuboctahedra that share corners with eight equivalent Ag(2)Eu4Ga2Ag6 cuboctahedra, corners with eight equivalent Ga(1)Eu4Ag8 cuboctahedra, edges with two equivalent Ga(1)Eu4Ag8 cuboctahedra, edges with eight equivalent Ag(2)Eu4Ga2Ag6 cuboctahedra, faces with two equivalent Ga(1)Eu4Ag8 cuboctahedra, and faces with eight equivalent Ag(2)Eu4Ga2Ag6 cuboctahedra.
EuAg4Ga crystallizes in the orthorhombic Cmmm space group. Eu(1) is bonded in a 18-coordinate geometry to six equivalent Ag(1), eight equivalent Ag(2), and four equivalent Ga(1) atoms. There are two shorter (3.21 Å) and four longer (3.24 Å) Eu(1)-Ag(1) bond lengths. All Eu(1)-Ag(2) bond lengths are 3.58 Å. All Eu(1)-Ga(1) bond lengths are 3.68 Å. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 12-coordinate geometry to three equivalent Eu(1), three equivalent Ag(1), four equivalent Ag(2), and two equivalent Ga(1) atoms. There is one shorter (2.96 Å) and two longer (3.36 Å) Ag(1)-Ag(1) bond lengths. All Ag(1)-Ag(2) bond lengths are 2.84 Å. Both Ag(1)-Ga(1) bond lengths are 2.73 Å. In the second Ag site, Ag(2) is bonded to four equivalent Eu(1), two equivalent Ag(2), four equivalent Ag(1), and two equivalent Ga(1) atoms to form AgEu4Ga2Ag6 cuboctahedra that share corners with four equivalent Ga(1)Eu4Ag8 cuboctahedra, corners with twelve equivalent Ag(2)Eu4Ga2Ag6 cuboctahedra, edges with four equivalent Ga(1)Eu4Ag8 cuboctahedra, edges with six equivalent Ag(2)Eu4Ga2Ag6 cuboctahedra, faces with four equivalent Ga(1)Eu4Ag8 cuboctahedra, and faces with six equivalent Ag(2)Eu4Ga2Ag6 cuboctahedra. Both Ag(2)-Ag(2) bond lengths are 2.88 Å. Both Ag(2)-Ga(1) bond lengths are 2.75 Å. Ga(1) is bonded to four equivalent Eu(1), four equivalent Ag(1), and four equivalent Ag(2) atoms to form distorted GaEu4Ag8 cuboctahedra that share corners with eight equivalent Ag(2)Eu4Ga2Ag6 cuboctahedra, corners with eight equivalent Ga(1)Eu4Ag8 cuboctahedra, edges with two equivalent Ga(1)Eu4Ag8 cuboctahedra, edges with eight equivalent Ag(2)Eu4Ga2Ag6 cuboctahedra, faces with two equivalent Ga(1)Eu4Ag8 cuboctahedra, and faces with eight equivalent Ag(2)Eu4Ga2Ag6 cuboctahedra.