Sr(SmSe2)2 crystallizes in the tetragonal I-42d space group. Sr(1) is bonded in a 8-coordinate geometry to eight equivalent Se(1) atoms. Sm(1) is bonded to eight equivalent Se(1) atoms to form a mixture of distorted face, corner, and edge-sharing SmSe8 hexagonal bipyramids. Se(1) is bonded to two equivalent Sr(1) and four equivalent Sm(1) atoms to form a mixture of distorted face, corner, and edge-sharing SeSr2Sm4 octahedra. The corner-sharing octahedral tilt angles range from 17-50°.
Sr(SmSe2)2 crystallizes in the tetragonal I-42d space group. Sr(1) is bonded in a 8-coordinate geometry to eight equivalent Se(1) atoms. There are four shorter (3.06 Å) and four longer (3.27 Å) Sr(1)-Se(1) bond lengths. Sm(1) is bonded to eight equivalent Se(1) atoms to form a mixture of distorted face, corner, and edge-sharing SmSe8 hexagonal bipyramids. There are a spread of Sm(1)-Se(1) bond distances ranging from 2.93-3.24 Å. Se(1) is bonded to two equivalent Sr(1) and four equivalent Sm(1) atoms to form a mixture of distorted face, corner, and edge-sharing SeSr2Sm4 octahedra. The corner-sharing octahedral tilt angles range from 17-50°.