LiEu2Ga7 crystallizes in the tetragonal P-4m2 space group. Li(1) is bonded to four equivalent Eu(1), four equivalent Ga(1), and four equivalent Ga(4) atoms to form distorted LiEu4Ga8 tetrahedra that share corners with four equivalent Ga(5)Eu4Ga8 cuboctahedra, corners with eight equivalent Ga(3)Eu4Ga8 cuboctahedra, corners with four equivalent Li(1)Eu4Ga8 tetrahedra, edges with two equivalent Ga(5)Eu4Ga8 cuboctahedra, faces with four equivalent Ga(4)Li4Eu4Ga4 cuboctahedra, and faces with four equivalent Li(1)Eu4Ga8 tetrahedra. Eu(1) is bonded in a 16-coordinate geometry to two equivalent Li(1), two equivalent Ga(3), two equivalent Ga(4), two equivalent Ga(5), four equivalent Ga(1), and four equivalent Ga(2) atoms. There are five inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to two equivalent Li(1), four equivalent Eu(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(3)Eu4Ga8 cuboctahedra, corners with four equivalent Ga(4)Li4Eu4Ga4 cuboctahedra, corners with eight equivalent Li(1)Eu4Ga8 tetrahedra, edges with two equivalent Ga(4)Li4Eu4Ga4 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 Li(1), four equivalent Eu(1), and four equivalent Ga(1) atoms to form GaLi4Eu4Ga4 cuboctahedra that share corners with four equivalent Ga(3)Eu4Ga8 cuboctahedra, corners with four equivalent Ga(4)Li4Eu4Ga4 cuboctahedra, corners with eight equivalent Ga(5)Eu4Ga8 cuboctahedra, edges with two equivalent Ga(3)Eu4Ga8 cuboctahedra, faces with four equivalent Ga(4)Li4Eu4Ga4 cuboctahedra, and faces with four equivalent Li(1)Eu4Ga8 tetrahedra. 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 Ga(5)Eu4Ga8 cuboctahedra, corners with eight equivalent Ga(4)Li4Eu4Ga4 cuboctahedra, corners with four equivalent Li(1)Eu4Ga8 tetrahedra, edges with two equivalent Li(1)Eu4Ga8 tetrahedra, faces with four equivalent Ga(3)Eu4Ga8 cuboctahedra, and faces with four equivalent Ga(5)Eu4Ga8 cuboctahedra.
LiEu2Ga7 crystallizes in the tetragonal P-4m2 space group. Li(1) is bonded to four equivalent Eu(1), four equivalent Ga(1), and four equivalent Ga(4) atoms to form distorted LiEu4Ga8 tetrahedra that share corners with four equivalent Ga(5)Eu4Ga8 cuboctahedra, corners with eight equivalent Ga(3)Eu4Ga8 cuboctahedra, corners with four equivalent Li(1)Eu4Ga8 tetrahedra, edges with two equivalent Ga(5)Eu4Ga8 cuboctahedra, faces with four equivalent Ga(4)Li4Eu4Ga4 cuboctahedra, and faces with four equivalent Li(1)Eu4Ga8 tetrahedra. All Li(1)-Eu(1) bond lengths are 3.50 Å. All Li(1)-Ga(1) bond lengths are 2.59 Å. All Li(1)-Ga(4) bond lengths are 3.03 Å. Eu(1) is bonded in a 16-coordinate geometry to two equivalent Li(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)-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 3.30 Å. All Eu(1)-Ga(2) bond lengths are 3.25 Å. There are five inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to two equivalent Li(1), four equivalent Eu(1), one Ga(2), and two equivalent Ga(4) atoms. The Ga(1)-Ga(2) bond length is 2.49 Å. Both Ga(1)-Ga(4) bond lengths are 2.59 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 2.61 Å. Both Ga(2)-Ga(5) bond lengths are 2.61 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(3)Eu4Ga8 cuboctahedra, corners with four equivalent Ga(4)Li4Eu4Ga4 cuboctahedra, corners with eight equivalent Li(1)Eu4Ga8 tetrahedra, edges with two equivalent Ga(4)Li4Eu4Ga4 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 3.03 Å. In the fourth Ga site, Ga(4) is bonded to four equivalent Li(1), four equivalent Eu(1), and four equivalent Ga(1) atoms to form GaLi4Eu4Ga4 cuboctahedra that share corners with four equivalent Ga(3)Eu4Ga8 cuboctahedra, corners with four equivalent Ga(4)Li4Eu4Ga4 cuboctahedra, corners with eight equivalent Ga(5)Eu4Ga8 cuboctahedra, edges with two equivalent Ga(3)Eu4Ga8 cuboctahedra, faces with four equivalent Ga(4)Li4Eu4Ga4 cuboctahedra, and faces with four equivalent Li(1)Eu4Ga8 tetrahedra. 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 Ga(5)Eu4Ga8 cuboctahedra, corners with eight equivalent Ga(4)Li4Eu4Ga4 cuboctahedra, corners with four equivalent Li(1)Eu4Ga8 tetrahedra, edges with two equivalent Li(1)Eu4Ga8 tetrahedra, faces with four equivalent Ga(3)Eu4Ga8 cuboctahedra, and faces with four equivalent Ga(5)Eu4Ga8 cuboctahedra.