YbGa4 crystallizes in the monoclinic C2/m space group. Yb(1) is bonded in a 16-coordinate geometry to eight equivalent Ga(1) and eight equivalent Ga(2) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Yb(1), one Ga(1), and four equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded in a 11-coordinate geometry to four equivalent Yb(1), three equivalent Ga(2), and four equivalent Ga(1) atoms.
YbGa4 crystallizes in the monoclinic C2/m space group. Yb(1) is bonded in a 16-coordinate geometry to eight equivalent Ga(1) and eight equivalent Ga(2) atoms. There are a spread of Yb(1)-Ga(1) bond distances ranging from 3.15-3.39 Å. There are four shorter (3.29 Å) and four longer (3.48 Å) Yb(1)-Ga(2) bond lengths. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Yb(1), one Ga(1), and four equivalent Ga(2) atoms. The Ga(1)-Ga(1) bond length is 2.43 Å. There are two shorter (2.54 Å) and two longer (2.61 Å) Ga(1)-Ga(2) bond lengths. In the second Ga site, Ga(2) is bonded in a 11-coordinate geometry to four equivalent Yb(1), three equivalent Ga(2), and four equivalent Ga(1) atoms. There is one shorter (2.73 Å) and two longer (3.05 Å) Ga(2)-Ga(2) bond lengths.