Th(PdSi)2 crystallizes in the tetragonal I4/mmm space group. Th(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 Th(1) and four equivalent Si(1) atoms to form a mixture of distorted corner, edge, and face-sharing PdTh4Si4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Th(1), four equivalent Pd(1), and one Si(1) atom.
Th(PdSi)2 crystallizes in the tetragonal I4/mmm space group. Th(1) is bonded in a 16-coordinate geometry to eight equivalent Pd(1) and eight equivalent Si(1) atoms. All Th(1)-Pd(1) bond lengths are 3.28 Å. All Th(1)-Si(1) bond lengths are 3.21 Å. Pd(1) is bonded to four equivalent Th(1) and four equivalent Si(1) atoms to form a mixture of distorted corner, edge, and face-sharing PdTh4Si4 tetrahedra. All Pd(1)-Si(1) bond lengths are 2.49 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Th(1), four equivalent Pd(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.37 Å.