Sm2Au 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 to four equivalent Au(1) atoms to form a mixture of corner and edge-sharing SmAu4 tetrahedra. In the second Sm site, Sm(2) is bonded in a 3-coordinate geometry to three equivalent Au(1) atoms. Au(1) is bonded in a 7-coordinate geometry to three equivalent Sm(2) and four equivalent Sm(1) atoms.
Sm2Au 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 to four equivalent Au(1) atoms to form a mixture of corner and edge-sharing SmAu4 tetrahedra. There are a spread of Sm(1)-Au(1) bond distances ranging from 2.97-3.11 Å. In the second Sm site, Sm(2) is bonded in a 3-coordinate geometry to three equivalent Au(1) atoms. There is one shorter (3.03 Å) and two longer (3.20 Å) Sm(2)-Au(1) bond lengths. Au(1) is bonded in a 7-coordinate geometry to three equivalent Sm(2) and four equivalent Sm(1) atoms.