Eu2AgGa7 crystallizes in the tetragonal P-4m2 space group. Eu(1) is bonded in a 16-coordinate geometry to two equivalent Ag(1), two equivalent Ga(3), two equivalent Ga(4), two equivalent Ga(5), four equivalent Ga(1), and four equivalent Ga(2) atoms. Ag(1) is bonded to four equivalent Eu(1), four equivalent Ga(1), and four equivalent Ga(4) atoms to form distorted AgEu4Ga8 cuboctahedra that share corners with four equivalent Ag(1)Eu4Ga8 cuboctahedra, corners with four equivalent Ga(5)Eu4Ga8 cuboctahedra, corners with eight equivalent Ga(3)Eu4Ga8 cuboctahedra, edges with two equivalent Ga(5)Eu4Ga8 cuboctahedra, faces with four equivalent Ag(1)Eu4Ga8 cuboctahedra, and faces with four equivalent Ga(4)Eu4Ga4Ag4 cuboctahedra. There are five inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), two equivalent Ag(1), one Ga(2), and two equivalent Ga(4) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Ga(1), two equivalent Ga(3), and two equivalent Ga(5) atoms. In the third Ga site, Ga(3) is bonded to four equivalent Eu(1), four equivalent Ga(2), and four equivalent Ga(5) atoms to form distorted GaEu4Ga8 cuboctahedra that share corners with four equivalent Ga(4)Eu4Ga4Ag4 cuboctahedra, corners with four equivalent Ga(3)Eu4Ga8 cuboctahedra, corners with eight equivalent Ag(1)Eu4Ga8 cuboctahedra, edges with two equivalent Ga(4)Eu4Ga4Ag4 cuboctahedra, faces with four equivalent Ga(3)Eu4Ga8 cuboctahedra, and faces with four equivalent Ga(5)Eu4Ga8 cuboctahedra. In the fourth Ga site, Ga(4) is bonded to four equivalent Eu(1), four equivalent Ag(1), and four equivalent Ga(1) atoms to form GaEu4Ga4Ag4 cuboctahedra that share corners with four equivalent Ga(4)Eu4Ga4Ag4 cuboctahedra, corners with four equivalent Ga(3)Eu4Ga8 cuboctahedra, corners with eight equivalent Ga(5)Eu4Ga8 cuboctahedra, edges with two equivalent Ga(3)Eu4Ga8 cuboctahedra, faces with four equivalent Ag(1)Eu4Ga8 cuboctahedra, and faces with four equivalent Ga(4)Eu4Ga4Ag4 cuboctahedra. In the fifth Ga site, Ga(5) is bonded to four equivalent Eu(1), four equivalent Ga(2), and four equivalent Ga(3) atoms to form distorted GaEu4Ga8 cuboctahedra that share corners with four equivalent Ag(1)Eu4Ga8 cuboctahedra, corners with four equivalent Ga(5)Eu4Ga8 cuboctahedra, corners with eight equivalent Ga(4)Eu4Ga4Ag4 cuboctahedra, edges with two equivalent Ag(1)Eu4Ga8 cuboctahedra, faces with four equivalent Ga(3)Eu4Ga8 cuboctahedra, and faces with four equivalent Ga(5)Eu4Ga8 cuboctahedra.
Eu2AgGa7 crystallizes in the tetragonal P-4m2 space group. Eu(1) is bonded in a 16-coordinate geometry to two equivalent Ag(1), two equivalent Ga(3), two equivalent Ga(4), two equivalent Ga(5), four equivalent Ga(1), and four equivalent Ga(2) atoms. Both Eu(1)-Ag(1) bond lengths are 3.50 Å. Both Eu(1)-Ga(3) bond lengths are 3.42 Å. Both Eu(1)-Ga(4) bond lengths are 3.50 Å. Both Eu(1)-Ga(5) bond lengths are 3.42 Å. All Eu(1)-Ga(1) bond lengths are 3.31 Å. All Eu(1)-Ga(2) bond lengths are 3.28 Å. Ag(1) is bonded to four equivalent Eu(1), four equivalent Ga(1), and four equivalent Ga(4) atoms to form distorted AgEu4Ga8 cuboctahedra that share corners with four equivalent Ag(1)Eu4Ga8 cuboctahedra, corners with four equivalent Ga(5)Eu4Ga8 cuboctahedra, corners with eight equivalent Ga(3)Eu4Ga8 cuboctahedra, edges with two equivalent Ga(5)Eu4Ga8 cuboctahedra, faces with four equivalent Ag(1)Eu4Ga8 cuboctahedra, and faces with four equivalent Ga(4)Eu4Ga4Ag4 cuboctahedra. All Ag(1)-Ga(1) bond lengths are 2.62 Å. All Ag(1)-Ga(4) bond lengths are 3.06 Å. There are five inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), two equivalent Ag(1), one Ga(2), and two equivalent Ga(4) atoms. The Ga(1)-Ga(2) bond length is 2.48 Å. Both Ga(1)-Ga(4) bond lengths are 2.62 Å. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Ga(1), two equivalent Ga(3), and two equivalent Ga(5) atoms. Both Ga(2)-Ga(3) bond lengths are 2.60 Å. Both Ga(2)-Ga(5) bond lengths are 2.60 Å. In the third Ga site, Ga(3) is bonded to four equivalent Eu(1), four equivalent Ga(2), and four equivalent Ga(5) atoms to form distorted GaEu4Ga8 cuboctahedra that share corners with four equivalent Ga(4)Eu4Ga4Ag4 cuboctahedra, corners with four equivalent Ga(3)Eu4Ga8 cuboctahedra, corners with eight equivalent Ag(1)Eu4Ga8 cuboctahedra, edges with two equivalent Ga(4)Eu4Ga4Ag4 cuboctahedra, faces with four equivalent Ga(3)Eu4Ga8 cuboctahedra, and faces with four equivalent Ga(5)Eu4Ga8 cuboctahedra. All Ga(3)-Ga(5) bond lengths are 3.06 Å. In the fourth Ga site, Ga(4) is bonded to four equivalent Eu(1), four equivalent Ag(1), and four equivalent Ga(1) atoms to form GaEu4Ga4Ag4 cuboctahedra that share corners with four equivalent Ga(4)Eu4Ga4Ag4 cuboctahedra, corners with four equivalent Ga(3)Eu4Ga8 cuboctahedra, corners with eight equivalent Ga(5)Eu4Ga8 cuboctahedra, edges with two equivalent Ga(3)Eu4Ga8 cuboctahedra, faces with four equivalent Ag(1)Eu4Ga8 cuboctahedra, and faces with four equivalent Ga(4)Eu4Ga4Ag4 cuboctahedra. In the fifth Ga site, Ga(5) is bonded to four equivalent Eu(1), four equivalent Ga(2), and four equivalent Ga(3) atoms to form distorted GaEu4Ga8 cuboctahedra that share corners with four equivalent Ag(1)Eu4Ga8 cuboctahedra, corners with four equivalent Ga(5)Eu4Ga8 cuboctahedra, corners with eight equivalent Ga(4)Eu4Ga4Ag4 cuboctahedra, edges with two equivalent Ag(1)Eu4Ga8 cuboctahedra, faces with four equivalent Ga(3)Eu4Ga8 cuboctahedra, and faces with four equivalent Ga(5)Eu4Ga8 cuboctahedra.