Sm2Bi crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to five equivalent Bi(1) atoms to form a mixture of distorted corner and edge-sharing SmBi5 square pyramids. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to four equivalent Sm(2) and four equivalent Bi(1) atoms. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Sm(2) and five equivalent Sm(1) atoms.
Sm2Bi crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to five equivalent Bi(1) atoms to form a mixture of distorted corner and edge-sharing SmBi5 square pyramids. There is one shorter (3.25 Å) and four longer (3.31 Å) Sm(1)-Bi(1) bond lengths. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to four equivalent Sm(2) and four equivalent Bi(1) atoms. All Sm(2)-Sm(2) bond lengths are 3.23 Å. All Sm(2)-Bi(1) bond lengths are 3.37 Å. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Sm(2) and five equivalent Sm(1) atoms.