Dy3Ga2 crystallizes in the tetragonal I4/mcm space group. There are three inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 4-coordinate geometry to two equivalent Ga(3) and four equivalent Ga(4) atoms. In the second Dy site, Dy(2) is bonded in a 5-coordinate geometry to two equivalent Ga(4) and three equivalent Ga(3) atoms. In the third Dy site, Dy(3) is bonded in a 6-coordinate geometry to one Ga(1), one Ga(2), one Ga(3), and three equivalent Ga(4) atoms. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 8-coordinate geometry to eight equivalent Dy(3) atoms. In the second Ga site, Ga(2) is bonded in a body-centered cubic geometry to eight equivalent Dy(3) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to two equivalent Dy(1), three equivalent Dy(2), and four equivalent Dy(3) atoms. In the fourth Ga site, Ga(4) is bonded in a 10-coordinate geometry to one Dy(2), two equivalent Dy(1), six equivalent Dy(3), and one Ga(4) atom.
Dy3Ga2 crystallizes in the tetragonal I4/mcm space group. There are three inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 4-coordinate geometry to two equivalent Ga(3) and four equivalent Ga(4) atoms. Both Dy(1)-Ga(3) bond lengths are 2.90 Å. There are two shorter (3.03 Å) and two longer (3.69 Å) Dy(1)-Ga(4) bond lengths. In the second Dy site, Dy(2) is bonded in a 5-coordinate geometry to two equivalent Ga(4) and three equivalent Ga(3) atoms. Both Dy(2)-Ga(4) bond lengths are 2.98 Å. There are two shorter (3.36 Å) and one longer (3.52 Å) Dy(2)-Ga(3) bond length. In the third Dy site, Dy(3) is bonded in a 6-coordinate geometry to one Ga(1), one Ga(2), one Ga(3), and three equivalent Ga(4) atoms. The Dy(3)-Ga(1) bond length is 2.99 Å. The Dy(3)-Ga(2) bond length is 3.18 Å. The Dy(3)-Ga(3) bond length is 2.96 Å. There are a spread of Dy(3)-Ga(4) bond distances ranging from 3.06-3.31 Å. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 8-coordinate geometry to eight equivalent Dy(3) atoms. In the second Ga site, Ga(2) is bonded in a body-centered cubic geometry to eight equivalent Dy(3) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to two equivalent Dy(1), three equivalent Dy(2), and four equivalent Dy(3) atoms. In the fourth Ga site, Ga(4) is bonded in a 10-coordinate geometry to one Dy(2), two equivalent Dy(1), six equivalent Dy(3), and one Ga(4) atom. The Ga(4)-Ga(4) bond length is 2.76 Å.