Sm2Al is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 5-coordinate geometry to five equivalent Al(1) atoms. In the second Sm site, Sm(2) is bonded in a 3-coordinate geometry to five equivalent Al(1) atoms. Al(1) is bonded in a 10-coordinate geometry to five equivalent Sm(1) and five equivalent Sm(2) atoms.
Sm2Al is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 5-coordinate geometry to five equivalent Al(1) atoms. There are a spread of Sm(1)-Al(1) bond distances ranging from 3.12-3.46 Å. In the second Sm site, Sm(2) is bonded in a 3-coordinate geometry to five equivalent Al(1) atoms. There are a spread of Sm(2)-Al(1) bond distances ranging from 3.20-3.65 Å. Al(1) is bonded in a 10-coordinate geometry to five equivalent Sm(1) and five equivalent Sm(2) atoms.