Y3Ag3Ga8 crystallizes in the orthorhombic Immm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to four equivalent Ga(2) and eight equivalent Ga(1) atoms to form distorted YGa12 cuboctahedra that share edges with two equivalent Ag(2)Y4Ga4Ag4 cuboctahedra and faces with two equivalent Y(1)Ga12 cuboctahedra. In the second Y site, Y(2) is bonded in a 14-coordinate geometry to two equivalent Ag(1), two equivalent Ag(2), four equivalent Ga(1), and six equivalent Ga(2) atoms. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 10-coordinate geometry to two equivalent Y(2), two equivalent Ag(2), two equivalent Ga(1), and four equivalent Ga(2) atoms. In the second Ag site, Ag(2) is bonded to four equivalent Y(2), four equivalent Ag(1), and four equivalent Ga(2) atoms to form AgY4Ga4Ag4 cuboctahedra that share edges with two equivalent Y(1)Ga12 cuboctahedra and faces with two equivalent Ag(2)Y4Ga4Ag4 cuboctahedra. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to two equivalent Y(1), two equivalent Y(2), one Ag(1), one Ga(1), and three equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded in a 10-coordinate geometry to one Y(1), three equivalent Y(2), one Ag(2), two equivalent Ag(1), and three equivalent Ga(1) atoms.
Y3Ag3Ga8 crystallizes in the orthorhombic Immm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to four equivalent Ga(2) and eight equivalent Ga(1) atoms to form distorted YGa12 cuboctahedra that share edges with two equivalent Ag(2)Y4Ga4Ag4 cuboctahedra and faces with two equivalent Y(1)Ga12 cuboctahedra. All Y(1)-Ga(2) bond lengths are 3.27 Å. All Y(1)-Ga(1) bond lengths are 3.25 Å. In the second Y site, Y(2) is bonded in a 14-coordinate geometry to two equivalent Ag(1), two equivalent Ag(2), four equivalent Ga(1), and six equivalent Ga(2) atoms. Both Y(2)-Ag(1) bond lengths are 3.18 Å. Both Y(2)-Ag(2) bond lengths are 3.39 Å. All Y(2)-Ga(1) bond lengths are 3.11 Å. There are four shorter (3.12 Å) and two longer (3.38 Å) Y(2)-Ga(2) bond lengths. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 10-coordinate geometry to two equivalent Y(2), two equivalent Ag(2), two equivalent Ga(1), and four equivalent Ga(2) atoms. Both Ag(1)-Ag(2) bond lengths are 2.85 Å. Both Ag(1)-Ga(1) bond lengths are 2.68 Å. All Ag(1)-Ga(2) bond lengths are 2.87 Å. In the second Ag site, Ag(2) is bonded to four equivalent Y(2), four equivalent Ag(1), and four equivalent Ga(2) atoms to form AgY4Ga4Ag4 cuboctahedra that share edges with two equivalent Y(1)Ga12 cuboctahedra and faces with two equivalent Ag(2)Y4Ga4Ag4 cuboctahedra. All Ag(2)-Ga(2) bond lengths are 2.81 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to two equivalent Y(1), two equivalent Y(2), one Ag(1), one Ga(1), and three equivalent Ga(2) atoms. The Ga(1)-Ga(1) bond length is 2.52 Å. There are two shorter (2.61 Å) and one longer (2.72 Å) Ga(1)-Ga(2) bond length. In the second Ga site, Ga(2) is bonded in a 10-coordinate geometry to one Y(1), three equivalent Y(2), one Ag(2), two equivalent Ag(1), and three equivalent Ga(1) atoms.