Sm2PbS4 crystallizes in the tetragonal I-42d space group. Sm(1) is bonded to eight equivalent S(1) atoms to form a mixture of distorted corner, edge, and face-sharing SmS8 hexagonal bipyramids. Pb(1) is bonded in a 8-coordinate geometry to eight equivalent S(1) atoms. S(1) is bonded in a 6-coordinate geometry to four equivalent Sm(1) and two equivalent Pb(1) atoms.
Sm2PbS4 crystallizes in the tetragonal I-42d space group. Sm(1) is bonded to eight equivalent S(1) atoms to form a mixture of distorted corner, edge, and face-sharing SmS8 hexagonal bipyramids. There are a spread of Sm(1)-S(1) bond distances ranging from 2.82-3.08 Å. Pb(1) is bonded in a 8-coordinate geometry to eight equivalent S(1) atoms. There are four shorter (2.96 Å) and four longer (3.13 Å) Pb(1)-S(1) bond lengths. S(1) is bonded in a 6-coordinate geometry to four equivalent Sm(1) and two equivalent Pb(1) atoms.