Materials Data on SmSbS by Materials Project
SmSbS is Matlockite structured and crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Sm3+ is bonded in a 5-coordinate geometry to four equivalent Sb1- and five equivalent S2- atoms. There are a spread of Sm–Sb bond distances ranging from 3.36–3.45 Å. There are a spread of Sm–S bond distances ranging from 2.83–2.99 Å. Sb1- is bonded to four equivalent Sm3+ and four equivalent Sb1- atoms to form distorted SbSm4Sb4 hexagonal bipyramids that share corners with four equivalent SbSm4Sb4 hexagonal bipyramids, corners with twelve equivalent SSm5 square pyramids, edges with four equivalent SbSm4Sb4 hexagonal bipyramids, edges with four equivalent SSm5 square pyramids, and faces with four equivalent SbSm4Sb4 hexagonal bipyramids. There are two shorter (2.88 Å) and two longer (2.97 Å) Sb–Sb bond lengths. S2- is bonded to five equivalent Sm3+ atoms to form distorted SSm5 square pyramids that share corners with twelve equivalent SbSm4Sb4 hexagonal bipyramids, corners with four equivalent SSm5 square pyramids, edges with four equivalent SbSm4Sb4 hexagonal bipyramids, and edges with eight equivalent SSm5 square pyramids.