Yb2Au3Sn2 crystallizes in the trigonal R-3m space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 10-coordinate geometry to one Au(3), three equivalent Au(1), three equivalent Au(2), three equivalent Sn(1), and three equivalent Sn(2) atoms. In the second Yb site, Yb(2) is bonded to six equivalent Au(2) and six equivalent Sn(1) atoms to form distorted face-sharing YbSn6Au6 cuboctahedra. In the third Yb site, Yb(3) is bonded in a distorted body-centered cubic geometry to two equivalent Au(1), six equivalent Au(3), and six equivalent Sn(2) atoms. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded in a body-centered cubic geometry to one Yb(3), three equivalent Yb(1), one Sn(1), and three equivalent Sn(2) atoms. In the second Au site, Au(2) is bonded in a 9-coordinate geometry to three equivalent Yb(1), three equivalent Yb(2), and three equivalent Sn(1) atoms. In the third Au site, Au(3) is bonded in a body-centered cubic geometry to one Yb(1), three equivalent Yb(3), and four equivalent Sn(2) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 10-coordinate geometry to three equivalent Yb(1), three equivalent Yb(2), one Au(1), and three equivalent Au(2) atoms. In the second Sn site, Sn(2) is bonded in a 13-coordinate geometry to three equivalent Yb(1), three equivalent Yb(3), three equivalent Au(1), and four equivalent Au(3) atoms.
Yb2Au3Sn2 crystallizes in the trigonal R-3m space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 10-coordinate geometry to one Au(3), three equivalent Au(1), three equivalent Au(2), three equivalent Sn(1), and three equivalent Sn(2) atoms. The Yb(1)-Au(3) bond length is 3.11 Å. All Yb(1)-Au(1) bond lengths are 3.02 Å. All Yb(1)-Au(2) bond lengths are 3.43 Å. All Yb(1)-Sn(1) bond lengths are 3.29 Å. All Yb(1)-Sn(2) bond lengths are 3.58 Å. In the second Yb site, Yb(2) is bonded to six equivalent Au(2) and six equivalent Sn(1) atoms to form distorted face-sharing YbSn6Au6 cuboctahedra. All Yb(2)-Au(2) bond lengths are 3.26 Å. All Yb(2)-Sn(1) bond lengths are 3.40 Å. In the third Yb site, Yb(3) is bonded in a distorted body-centered cubic geometry to two equivalent Au(1), six equivalent Au(3), and six equivalent Sn(2) atoms. Both Yb(3)-Au(1) bond lengths are 3.08 Å. All Yb(3)-Au(3) bond lengths are 3.00 Å. All Yb(3)-Sn(2) bond lengths are 3.42 Å. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded in a body-centered cubic geometry to one Yb(3), three equivalent Yb(1), one Sn(1), and three equivalent Sn(2) atoms. The Au(1)-Sn(1) bond length is 2.89 Å. All Au(1)-Sn(2) bond lengths are 3.00 Å. In the second Au site, Au(2) is bonded in a 9-coordinate geometry to three equivalent Yb(1), three equivalent Yb(2), and three equivalent Sn(1) atoms. All Au(2)-Sn(1) bond lengths are 2.80 Å. In the third Au site, Au(3) is bonded in a body-centered cubic geometry to one Yb(1), three equivalent Yb(3), and four equivalent Sn(2) atoms. There are three shorter (2.93 Å) and one longer (3.09 Å) Au(3)-Sn(2) bond length. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 10-coordinate geometry to three equivalent Yb(1), three equivalent Yb(2), one Au(1), and three equivalent Au(2) atoms. In the second Sn site, Sn(2) is bonded in a 13-coordinate geometry to three equivalent Yb(1), three equivalent Yb(3), three equivalent Au(1), and four equivalent Au(3) atoms.