Materials Data on Np2SO2 by Materials Project

Np2SO2 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Np3+ is bonded in a 7-coordinate geometry to three equivalent S2- and four equivalent O2- atoms. All Np–S bond lengths are 2.76 Å. There are three shorter (2.25 Å) and one longer (2.30 Å) Np–O bond lengths. S2- is bonded to six equivalent Np3+ atoms to form distorted SNp6 octahedra that share corners with twelve equivalent ONp4 tetrahedra, edges with six equivalent SNp6 octahedra, and edges with six equivalent ONp4 tetrahedra. O2- is bonded to four equivalent Np3+ atoms to form ONp4 tetrahedra that share corners with six equivalent SNp6 octahedra, corners with six equivalent ONp4 tetrahedra, edges with three equivalent SNp6 octahedra, and edges with three equivalent ONp4 tetrahedra. The corner-sharing octahedra tilt angles range from 22–51°.