NpSi crystallizes in the orthorhombic Pnma space group. Np(1) is bonded in a 8-coordinate geometry to two equivalent Np(1) and six equivalent Si(1) atoms. Si(1) is bonded in a 10-coordinate geometry to six equivalent Np(1) and four equivalent Si(1) atoms.
NpSi crystallizes in the orthorhombic Pnma space group. Np(1) is bonded in a 8-coordinate geometry to two equivalent Np(1) and six equivalent Si(1) atoms. Both Np(1)-Np(1) bond lengths are 2.57 Å. There are a spread of Np(1)-Si(1) bond distances ranging from 2.89-3.03 Å. Si(1) is bonded in a 10-coordinate geometry to six equivalent Np(1) and four equivalent Si(1) atoms. There are two shorter (2.50 Å) and two longer (2.57 Å) Si(1)-Si(1) bond lengths.