YbAu2Si2 crystallizes in the tetragonal I4/mmm space group. Yb(1) is bonded in a 16-coordinate geometry to eight equivalent Au(1) and eight equivalent Si(1) atoms. Au(1) is bonded in a 4-coordinate geometry to four equivalent Yb(1) and four equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to four equivalent Yb(1), four equivalent Au(1), and one Si(1) atom.
YbAu2Si2 crystallizes in the tetragonal I4/mmm space group. Yb(1) is bonded in a 16-coordinate geometry to eight equivalent Au(1) and eight equivalent Si(1) atoms. All Yb(1)-Au(1) bond lengths are 3.29 Å. All Yb(1)-Si(1) bond lengths are 3.26 Å. Au(1) is bonded in a 4-coordinate geometry to four equivalent Yb(1) and four equivalent Si(1) atoms. All Au(1)-Si(1) bond lengths are 2.54 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Yb(1), four equivalent Au(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.28 Å.