Th(NiSi)2 crystallizes in the tetragonal I4/mmm space group. Th(1) is bonded in a 16-coordinate geometry to eight equivalent Ni(1) and eight equivalent Si(1) atoms. Ni(1) is bonded in a 8-coordinate geometry to four equivalent Th(1) and four equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to four equivalent Th(1), four equivalent Ni(1), and one Si(1) atom.
Th(NiSi)2 crystallizes in the tetragonal I4/mmm space group. Th(1) is bonded in a 16-coordinate geometry to eight equivalent Ni(1) and eight equivalent Si(1) atoms. All Th(1)-Ni(1) bond lengths are 3.13 Å. All Th(1)-Si(1) bond lengths are 3.14 Å. Ni(1) is bonded in a 8-coordinate geometry to four equivalent Th(1) and four equivalent Si(1) atoms. All Ni(1)-Si(1) bond lengths are 2.33 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Th(1), four equivalent Ni(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.48 Å.