Yb4Cu2Sn5 crystallizes in the orthorhombic Pmmn space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 9-coordinate geometry to two equivalent Cu(1), one Sn(3), three equivalent Sn(1), and three equivalent Sn(2) atoms. In the second Yb site, Yb(2) is bonded in a 12-coordinate geometry to four equivalent Cu(1), two equivalent Sn(2), two equivalent Sn(3), and four equivalent Sn(1) atoms. In the third Yb site, Yb(3) is bonded in a 8-coordinate geometry to two equivalent Sn(2), two equivalent Sn(3), and four equivalent Sn(1) atoms. Cu(1) is bonded in a 9-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), one Sn(1), one Sn(3), and three equivalent Sn(2) atoms. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to two equivalent Yb(2), two equivalent Yb(3), three equivalent Yb(1), one Cu(1), and one Sn(1) atom. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to one Yb(2), one Yb(3), three equivalent Yb(1), three equivalent Cu(1), and two equivalent Sn(3) atoms. In the third Sn site, Sn(3) is bonded to two equivalent Yb(1), two equivalent Yb(2), two equivalent Yb(3), two equivalent Cu(1), and four equivalent Sn(2) atoms to form distorted face-sharing SnYb6Cu2Sn4 cuboctahedra.
Yb4Cu2Sn5 crystallizes in the orthorhombic Pmmn space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 9-coordinate geometry to two equivalent Cu(1), one Sn(3), three equivalent Sn(1), and three equivalent Sn(2) atoms. Both Yb(1)-Cu(1) bond lengths are 3.05 Å. The Yb(1)-Sn(3) bond length is 3.81 Å. There is one shorter (3.18 Å) and two longer (3.23 Å) Yb(1)-Sn(1) bond lengths. There are two shorter (3.26 Å) and one longer (3.33 Å) Yb(1)-Sn(2) bond length. In the second Yb site, Yb(2) is bonded in a 12-coordinate geometry to four equivalent Cu(1), two equivalent Sn(2), two equivalent Sn(3), and four equivalent Sn(1) atoms. All Yb(2)-Cu(1) bond lengths are 3.03 Å. Both Yb(2)-Sn(2) bond lengths are 3.21 Å. Both Yb(2)-Sn(3) bond lengths are 3.41 Å. All Yb(2)-Sn(1) bond lengths are 3.24 Å. In the third Yb site, Yb(3) is bonded in a 8-coordinate geometry to two equivalent Sn(2), two equivalent Sn(3), and four equivalent Sn(1) atoms. Both Yb(3)-Sn(2) bond lengths are 3.54 Å. Both Yb(3)-Sn(3) bond lengths are 3.26 Å. All Yb(3)-Sn(1) bond lengths are 3.26 Å. Cu(1) is bonded in a 9-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), one Sn(1), one Sn(3), and three equivalent Sn(2) atoms. The Cu(1)-Sn(1) bond length is 2.64 Å. The Cu(1)-Sn(3) bond length is 2.78 Å. All Cu(1)-Sn(2) bond lengths are 2.73 Å. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to two equivalent Yb(2), two equivalent Yb(3), three equivalent Yb(1), one Cu(1), and one Sn(1) atom. The Sn(1)-Sn(1) bond length is 2.86 Å. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to one Yb(2), one Yb(3), three equivalent Yb(1), three equivalent Cu(1), and two equivalent Sn(3) atoms. Both Sn(2)-Sn(3) bond lengths are 3.15 Å. In the third Sn site, Sn(3) is bonded to two equivalent Yb(1), two equivalent Yb(2), two equivalent Yb(3), two equivalent Cu(1), and four equivalent Sn(2) atoms to form distorted face-sharing SnYb6Cu2Sn4 cuboctahedra.