Sc2Se3 crystallizes in the orthorhombic Immm space group. Sc(1) is bonded to two equivalent Se(1) and four equivalent Se(2) atoms to form a mixture of edge and corner-sharing ScSe6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a square co-planar geometry to four equivalent Sc(1) atoms. In the second Se site, Se(2) is bonded in a rectangular see-saw-like geometry to four equivalent Sc(1) atoms.
Sc2Se3 crystallizes in the orthorhombic Immm space group. Sc(1) is bonded to two equivalent Se(1) and four equivalent Se(2) atoms to form a mixture of edge and corner-sharing ScSe6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. Both Sc(1)-Se(1) bond lengths are 2.71 Å. There are two shorter (2.69 Å) and two longer (2.71 Å) Sc(1)-Se(2) bond lengths. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a square co-planar geometry to four equivalent Sc(1) atoms. In the second Se site, Se(2) is bonded in a rectangular see-saw-like geometry to four equivalent Sc(1) atoms.