Np(NiSi)2 crystallizes in the tetragonal I4/mmm space group. Np(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 12-coordinate geometry to four equivalent Np(1), four equivalent Ni(1), and four equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to four equivalent Np(1), four equivalent Ni(1), and one Si(1) atom.
Np(NiSi)2 crystallizes in the tetragonal I4/mmm space group. Np(1) is bonded in a 16-coordinate geometry to eight equivalent Ni(1) and eight equivalent Si(1) atoms. All Np(1)-Ni(1) bond lengths are 3.14 Å. All Np(1)-Si(1) bond lengths are 3.03 Å. Ni(1) is bonded in a 12-coordinate geometry to four equivalent Np(1), four equivalent Ni(1), and four equivalent Si(1) atoms. All Ni(1)-Ni(1) bond lengths are 2.78 Å. All Ni(1)-Si(1) bond lengths are 2.32 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Np(1), four equivalent Ni(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.42 Å.