Tm(PdSi)2 crystallizes in the tetragonal I4/mmm space group. Tm(1) is bonded in a 16-coordinate geometry to eight equivalent Pd(1) and eight equivalent Si(1) atoms. Pd(1) is bonded to four equivalent Tm(1) and four equivalent Si(1) atoms to form a mixture of distorted face, corner, and edge-sharing PdTm4Si4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Tm(1), four equivalent Pd(1), and one Si(1) atom.
Tm(PdSi)2 crystallizes in the tetragonal I4/mmm space group. Tm(1) is bonded in a 16-coordinate geometry to eight equivalent Pd(1) and eight equivalent Si(1) atoms. All Tm(1)-Pd(1) bond lengths are 3.22 Å. All Tm(1)-Si(1) bond lengths are 3.11 Å. Pd(1) is bonded to four equivalent Tm(1) and four equivalent Si(1) atoms to form a mixture of distorted face, corner, and edge-sharing PdTm4Si4 tetrahedra. All Pd(1)-Si(1) bond lengths are 2.45 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Tm(1), four equivalent Pd(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.29 Å.